SIST EN ISO 11997-1:2017
(Main)Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1: Wet (salt fog)/dry/humid (ISO 11997-1:2017)
Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1: Wet (salt fog)/dry/humid (ISO 11997-1:2017)
This document specifies a method for the determination of the resistance of coatings to one of four
defined cycles of wet (salt fog)/dry/humid conditions using specified solutions.
Beschichtungsstoffe - Bestimmung der Beständigkeit bei zyklischen Korrosionsbedingungen - Teil 1: Nass (Salzsprühnebel)/trocken/Feuchte (ISO 11997-1:2017)
Dieser Teil von ISO 11997 legt ein Verfahren zum Bestimmen der Beständigkeit von Beschichtungen gegen einen von vier festgelegten Zyklen bei Bedingungen, die Nässe (Salz¬sprüh¬nebel)/Trockenheit/Feuchte umfassen, fest. Dabei werden festgelegte Lösungen verwendet.
Peintures et vernis - Détermination de la résistance aux conditions de corrosion cyclique - Partie 1: Brouillard salin/sécheresse/humidité (ISO 11997-1:2017)
ISO 11997-1:2017 spécifie une méthode pour la détermination de la résistance des revêtements à l'un des quatre cycles définis brouillard salin/sécheresse/humidité, au moyen de solutions spécifiques.
Barve in laki - Ugotavljanje odpornosti proti cikličnim korozijskim pogojem - 1. del: Mokro (slana megla)/suho/vlažno (ISO 11997-1:2017)
Ta dokument določa metodo za ugotavljanje odpornosti prevlek proti enemu od štirih
opredeljenih cikličnih mokrih (slana megla)/suhih/vlažnih pogojev s podanimi rešitvami.
General Information
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Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11997-1:2017
01-december-2017
1DGRPHãþD
SIST EN ISO 11997-1:2006
%DUYHLQODNL8JRWDYOMDQMHRGSRUQRVWLSURWLFLNOLþQLPNRUR]LMVNLPSRJRMHPGHO
0RNUR VODQDPHJOD VXKRYODåQR ,62
Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1:
Wet (salt fog)/dry/humid (ISO 11997-1:2017)
Beschichtungsstoffe - Bestimmung der Beständigkeit bei zyklischen
Korrosionsbedingungen - Teil 1: Nass (Salzsprühnebel)/trocken/Feuchte (ISO 11997-
1:2017)
Peintures et vernis - Détermination de la résistance aux conditions de corrosion cyclique
- Partie 1: Brouillard salin/sécheresse/humidité (ISO 11997-1:2017)
Ta slovenski standard je istoveten z: EN ISO 11997-1:2017
ICS:
87.040 Barve in laki Paints and varnishes
SIST EN ISO 11997-1:2017 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11997-1:2017
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SIST EN ISO 11997-1:2017
EN ISO 11997-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 11997-1:2006
English Version
Paints and varnishes - Determination of resistance to
cyclic corrosion conditions - Part 1: Wet (salt
fog)/dry/humid (ISO 11997-1:2017)
Peintures et vernis - Détermination de la résistance Beschichtungsstoffe - Bestimmung der Beständigkeit
aux conditions de corrosion cyclique - Partie 1: bei zyklischen Korrosionsbedingungen - Teil 1: Nass
Brouillard salin/sécheresse/humidité (ISO 11997- (Salzsprühnebel)/trocken/Feuchte (ISO 11997-
1:2017) 1:2017)
This European Standard was approved by CEN on 12 July 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11997-1:2017 E
worldwide for CEN national Members.
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SIST EN ISO 11997-1:2017
EN ISO 11997-1:2017 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 11997-1:2017
EN ISO 11997-1:2017 (E)
European foreword
This document (EN ISO 11997-1:2017) has been prepared by Technical Committee ISO/TC 35 “Paints
and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2018, and conflicting national standards shall
be withdrawn at the latest by March 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11997-1:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11997-1:2017 has been approved by CEN as EN ISO 11997-1:2017 without any
modification.
3
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SIST EN ISO 11997-1:2017
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SIST EN ISO 11997-1:2017
INTERNATIONAL ISO
STANDARD 11997-1
Third edition
2017-08
Paints and varnishes — Determination
of resistance to cyclic corrosion
conditions —
Part 1:
Wet (salt fog)/dry/humid
Peintures et vernis — Détermination de la résistance aux conditions
de corrosion cyclique —
Partie 1: Brouillard salin/sécheresse/humidité
Reference number
ISO 11997-1:2017(E)
©
ISO 2017
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Salt fog test solution . 2
6 Apparatus . 2
7 Sampling . 4
8 Test panels . 4
8.1 Material and dimensions . 4
8.2 Preparation and coating of panels . 4
8.3 Drying and conditioning . 4
8.4 Thickness of coating . 4
8.5 Preparation of scribe . 4
9 Method of exposure of test panels . 5
10 Operating conditions . 5
11 Procedure. 5
12 Examination of test panels . 5
13 Precision . 6
14 Test report . 6
Annex A (normative) Cycle A . 8
Annex B (normative) Cycle B . 9
Annex C (normative) Cycle C .10
Annex D (normative) Cycle D .12
Annex E (informative) Factors to be considered in the design and construction of salt
spray cabinets .13
Bibliography .14
© ISO 2017 – All rights reserved iii
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes.
This third edition cancels and replaces the second edition (ISO 11997-1:2005), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the time for no drops of moisture are visible on the panels (see 6.4) has been changed;
— a reference to ISO 4628-8 for assessment of degree of delamination and corrosion around a scribe
or other artificial defect has been added;
— a reference to ISO 4620-10 for assessment of degree of filiform corrosion has been added;
— the supplementary test conditions previously in Annex A have been integrated in the test report;
— the numbering and order of annexes has been changed;
— the adjustment procedure for the pH of the salt solution in Annex A to Annex D has been implemented
from ISO 9227;
— the text has been harmonized with the latest edition of ISO 9227 where possible.
A list of all parts in the ISO 11997 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
Introduction
Coatings of paints, varnishes and similar materials are exposed to one of four cycles of wet and dry
conditions specified in this document (see Annex A to Annex D), using specified salt solutions in a
cabinet in order to simulate, in the laboratory, processes occurring in aggressive outdoor conditions,
such as marine environments. Generally, correlation between such outdoor weathering and laboratory
testing cannot be expected because of the large number of factors influencing the breakdown process.
Correlation can only be expected if the effect on the coating of important parameters (e.g. the nature of
the pollutant, the spectral distribution of the incident irradiance in the relevant photochemical region,
the temperature of the specimen, the type and cycle of wetting and relative humidity) is known. In
contrast to outdoor weathering, laboratory testing in a cabinet is performed with a reduced number
of variables which can be controlled, and therefore the effects are more reproducible. The method
described may also give a means of checking that the quality of a paint or paint system is being
maintained.
The method has been found to be useful in comparing the cyclic salt spray resistance of different
coatings. It is most useful in providing relevant ratings for a series of coated panels exhibiting significant
differences in cyclic salt spray resistance.
The test cycles included in this document have been used successfully, with documented evidence, in
the industry for the assessment of performance. The cycles can be summarized as follows.
— Cycle A (see Annex A): This cycle is specified in Japanese Automobile Standards JASO M 609-91 and
JASO M610-92.
— Cycle B (see Annex B): This is based on the VDA 621-415 cycle and is widely used in Europe. It
has also been shown to give good correlation with natural weathering for thermosetting paints in
vehicle corrosion.
— Cycle C (see Annex C): This cycle was developed in the UK for use with water-soluble and latex
paint systems and has been shown to give good correlation with natural weathering.
— Cycle D (see Annex D): This cycle is specified in Japanese Standard JIS K 5621-2003.
It is intended that other cycles will be added at later revisions of this document, as they are developed
for evaluating other paint types.
ISO 11997-2 describes a method for determining the cyclic corrosion resistance of paints which includes
UV exposure as part of the cycle. It has been found to give good correlation with natural weathering for
industrial maintenance coatings.
© ISO 2017 – All rights reserved v
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SIST EN ISO 11997-1:2017
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SIST EN ISO 11997-1:2017
INTERNATIONAL STANDARD ISO 11997-1:2017(E)
Paints and varnishes — Determination of resistance to
cyclic corrosion conditions —
Part 1:
Wet (salt fog)/dry/humid
1 Scope
This document specifies a method for the determination of the resistance of coatings to one of four
defined cycles of wet (salt fog)/dry/humid conditions using specified solutions.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning
and testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and
designation system
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of
blistering
ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of
cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking
ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of
delamination and corrosion around a scribe or other artificial defect
ISO 4628-10, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 10: Assessment of degree of
filiform corrosion
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
© ISO 2017 – All rights reserved 1
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
ISO 17872:2007, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings
on metallic panels for corrosion testing
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
4 Principle
A coated test panel is exposed to a cyclic wet (salt fog), drying and humidity test schedule and the
effects of exposure are evaluated by criteria agreed in advance between the interested parties, these
criteria usually being of a subjective nature.
5 Salt fog test solution
Prepare the salt fog test solution by dissolving the salt or salts as given in Annexes A, B, C and D in
water conforming to at least grade 2 of ISO 3696 to produce the required concentration.
The salts shall be of analytical grade and contain a mass fraction of the heavy metals of copper (Cu),
nickel (Ni) and lead (Pb) in total less than 0,005 %. It shall not contain a mass fraction of sodium iodide
more than 0,1 % and a mass fraction of total impurities more than 0,5 % calculated for dry salt.
NOTE 1 Sodium chloride with anti-caking agents can act as corrosion inhibitors or accelerators. A useful
sodium chloride salt grade is a grade named Ph. Eur/USP or JIS, ACS.
If the pH of the solution is outside the required range (see Annexes A, B, C and D), the presence of
undesirable impurities in the salt or the water or both shall be investigated. Check the pH using
electrometric measurement. Measurements of pH shall be done using electrodes suitable for measuring
in weakly buffered sodium chloride solutions in deionized water. Any necessary corrections shall be
made by adding hydrochloric acid, sodium hydrogen carbonate or analytical-grade sodium hydroxide,
of appropriate concentrations.
NOTE 2 Attention is drawn to the possible changes in pH resulting from loss of carbon dioxide from the
solution when it is sprayed or from dissolution of carbon dioxide from the ambient atmosphere. Such changes
can be avoided by reducing the carbon dioxide content of the solution by, for example, heating it to a temperature
above 35 °C before it is placed in the cabinet or making the solution from freshly boiled water.
Filter the solution before placing it in the reservoir of the cabinet in order to remove any solid matter
which might block the apertures of the spraying device.
6 Apparatus
Ordinary laboratory apparatus and glassware, together with the following.
6.1 Spray cabinet, made of, or lined with, material resistant to corrosion by the sprayed solution and
having a roof which prevents condensed moisture dripping onto the test specimens. Due to the limited
3
capacity of cabinets smaller than 0,4 m , the effect of the loading of the cabinet on the distribution of the
2 © ISO 2017 – All rights reserved
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
spray and temperature shall be carefully considered. The solution shall not be sprayed directly onto test
specimens but rather spread throughout the cabinet so that it falls naturally down on them.
The size and shape of the cabinet shall be such that the salt fog deposition rate is within the limits given
in Annexes A, B, C and D.
3
NOTE Cabinets with a volume greater than 2 m will be difficult to operate unless careful consideration is
given to their design and construction.
Factors to be taken into consideration in the design and construction of the cabinet are given in Annex E.
If the cabinet has been used for a spray test, or for any other purpose, using a solution differing from
that specified for the current test cycle, it shall be thoroughly cleaned before use.
6.2 Hot-air blowers, capable of maintaining the cabinet and its contents at the specified temperatures
and achieving the required heating rates (see Annexes A, B, C and D). The temperature shall be controlled
by a thermostat element placed within the cabinet at least 100 mm from the walls of the cabinet.
6.3 Means for spraying the salt solution, comprising a supply of clean compressed air at a controlled
pressure, a reservoir to contain the solution to be sprayed and one or more atomizers made of material
resistant to the solution. The compressed-air supply to each atomizer shall be passed through a filter to
remove all traces of oil or solid matter, shall be at a suitable pressure depending upon the type of atomizer
nozzle and shall be adjusted so that the rate of collection of spray in the cabinet and the concentration of
the collected spray are kept within the specified limits (see Annexes A, B, C and D).
The reservoir containing the solution to be sprayed shall be a tank made of material resistant to the
solution and shall be provided with means of maintaining a constant flow of solution to the atomizers.
The atomizers shall be made of inert material, for example glass or plastic.
NOTE Baffles can be used to prevent direct impingement of spray on the test specimens, and the use of
adjustable baffles is helpful in obtaining uniform distribution of spray throughout the cabinet.
6.4 Drying-air supply, of 20 % to 30 % relative humidity for cycles A and D (see Annexes A and D)
and of (50 ± 20) % relative humidity for cycles B and C (see Annexes B and C). The air shall be passed
through a filter to remove all traces of oil or solid matter and shall have a flow rate sufficient to ensure
that no drops of moisture are visible on the panels after the drying time specified for cycles A and D and
after 45 min to 75 min after the start of the dry phase for cycle C. The panels shall not be dried by heaters
inside the cabinet walls.
NOTE It is common practice to vent the cabinet to the atmosphere outside the laboratory.
6.5 Collecting devices, at least two, of chemically inert material (see Note). The collecting devices shall
be placed in the zone of the cabinet where the test panels are placed, one close to the spray atomizer(s)
and one remote from the spray atomizer(s). They shall be placed so that only spray and not liquid falling
from test panels or from parts of the cabinet is collected. If two or more atomizers are used, the number
of collecting devices shall be at least twice the number of atomizers.
NOTE Glass funnels with the stems inserted into graduated cylinders have been found to be suitable
2
collecting devices. Funnels with a diameter of 100 mm have a collecting area of approximately 80 cm .
6.6 Test panel racks, made of inert non-metallic material such as glass, plastic or suitably coated
wood. Exceptionally, test panels may be suspended. In this case, the material used shall be synthetic
fibre, cotton thread or other inert insulating material; on no account shall metallic material be used. All
racks shall be placed at the same level in the cabinet so that the solution cannot drip from panels or racks
at one level onto other panels placed below.
6.7 Control equipment, for providing wet (salt fog)/dry/humid cycles for the times and temperatures
specified in Annexes A, B, C and D.
© ISO 2017 – All rights reserved 3
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SIST EN ISO 11997-1:2017
ISO 11997-1:2017(E)
7 Sampling
Take a representative sample of the product to be tested (or of each product in the case of a multi-coat
system) as described in ISO 15528.
Examine and prepare each sample for testing as described in ISO 1513.
8 Test panels
8.1 Material and dimensions
Unless otherwise specified or agreed, the test panels shall be of burnished steel complying with
ISO 1514 and of minimum dimensions 100 mm × 70 mm × 0,3 mm.
8.2 Preparation and coating of panels
Unless otherwise specified, prepare each test panel in accordance with ISO 1514 and then coat it by the
specified method with the product or system under test.
Unless otherwise specified, the back and edges of the panel shall be coated with the product or system
under test.
If the coating on the back and edges of the panel differs from that of the product under test, it shall have
a corrosion resistance greater than that of the product under test.
8.3 Drying and conditioning
Dry (or stove) and age (if applicable) each coated test panel for the specified time under the specified
conditions, and then, unless otherwise specified, condition them at a temperature and relative humidity
as defined in ISO 3270 for at least 16 h, with free circulation of air and without exposing them to direct
sunlight. The test procedure shall then be c
...
SLOVENSKI STANDARD
oSIST prEN ISO 11997-1:2017
01-marec-2017
%DUYHLQODNL8JRWDYOMDQMHRGSRUQRVWLSURWLFLNOLþQLPNRUR]LMVNLPSRJRMHPGHO
0RNUR VODQDPHJOD VXKRYODåQR ,62',6
Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1:
Wet (salt fog)/dry/humidity (ISO/DIS 11997-1:2016)
Beschichtungsstoffe - Bestimmung der Beständigkeit bei zyklischen
Korrosionsbedingungen - Teil 1: Nass (Salzsprühnebel)/trocken/Feuchte (ISO/DIS 11997
-1:2016)
Peintures et vernis - Détermination de la résistance aux conditions de corrosion cyclique
- Partie 1: Brouillard salin/sécheresse/humidité (ISO/DIS 11997-1:2016)
Ta slovenski standard je istoveten z: prEN ISO 11997-1
ICS:
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 11997-1:2017 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 11997-1:2017
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oSIST prEN ISO 11997-1:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11997-1.2
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2016-04-28 2016-06-27
Paints and varnishes — Determination of resistance to
cyclic corrosion conditions —
Part 1:
Wet (salt fog)/dry/humidity
Peintures et vernis — Détermination de la résistance aux conditions de corrosion cyclique —
Partie 1: Brouillard salin/sécheresse/humidité
ICS: 87.040
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11997-1.2:2016(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2016
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oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope.1
2 Normative references .1
3 Principle .2
4 Salt fog test solution .2
5 Apparatus.2
6 Sampling .3
7 Test panels .4
8 Method of exposure of test panels .4
9 Operating conditions.5
10 Procedure.5
11 Examination of test panels.5
12 Precision .6
13 Test report .6
Annex A (normative) Cycle A.8
Annex B (normative) Cycle B. 10
Annex C (normative) Cycle C. 12
Annex D (normative) Cycle D. 14
Annex E (informative) Factors to be considered in the design and construction
of salt spray cabinets . 15
Bibliography . 16
© ISO 2016 – All rights reserved iii
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oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11997-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
General test methods for paints and varnishes.
This third edition cancels and replaces the second edition (ISO 11997-1:2005), which has been technically
revised. The main technical changes are:
a) the time for no drops of moisture are visible on the panels (former 6.4, now 5.4) has been changed;
b) a reference to ISO 4628-8 for assessment of degree of delamination and corrosion around a scribe or
other artificial defect has been added;
c) the supplementary test conditions previously in Annex A have been integrated in the test report;
d) the numbering and order of Annexes has been changed;
e) the adjustment procedure for the pH of the salt solution in Annex A to Annex B has been implemented
from ISO 9227 [1].
ISO 11997 consists of the following parts, under the general title Paints and varnishes — Determination of
resistance to cyclic corrosion conditions:
Part 1: Wet (salt fog)/dry/humidity
Part 2: Wet (salt fog)/dry/humidity/UV light
iv © ISO 2016 – All rights reserved
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oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
Introduction
Coatings of paints, varnishes and similar materials are exposed to one of four cycles of wet and dry conditions
specified in this standard (Annex A to Annex D), using specified salt solutions in a cabinet in order to simulate,
in the laboratory, processes occurring in aggressive outdoor conditions, such as marine environments.
Generally, correlation between such outdoor weathering and laboratory testing cannot be expected because
of the large number of factors influencing the breakdown process. Correlation can only be expected if the
effect on the coating of important parameters (e.g. the nature of the pollutant, the spectral distribution of the
incident irradiance in the relevant photochemical region, the temperature of the specimen, the type and cycle
of wetting and relative humidity) is known. In contrast to outdoor weathering, laboratory testing in a cabinet is
performed with a reduced number of variables which can be controlled, and therefore the effects are more
reproducible. The method described may also give a means of checking that the quality of a paint or paint
system is being maintained.
The method has been found to be useful in comparing the cyclic salt spray resistance of different coatings. It
is most useful in providing relevant ratings for a series of coated panels exhibiting significant differences in
cyclic salt spray resistance.
The test cycles included in this part of ISO 11997 have been used successfully, with documented evidence, in
the industry for the assessment of performance. The cycles can be summarized as follows.
Cycle A (see Annex A): This cycle is specified in Japanese Automobile Standards JASO M 609-91,
Corrosion test method for automotive materials, and JASO M610-92, Cosmetic corrosion test method for
automotive parts.
Cycle B (see Annex B): This is based on the VDA 621-415 cycle and is widely used in Europe. It has
also been shown to give good correlation with natural weathering for thermosetting paints in vehicle
corrosion.
Cycle C (see Annex C): This cycle was developed in the UK for use with water-soluble and latex paint
systems, and has been shown to give good correlation with natural weathering.
Cycle D (see Annex D): This cycle is specified in Japanese Standard JIS K 5621-2003, Anticorrosive
paint for general use.
It is intended that other cycles will be added at later revisions of this part of ISO 11997, as they are developed
for evaluating other paint types.
ISO 11997-2 describes a method for determining the cyclic corrosion resistance of paints which includes UV
exposure as part of the cycle. It has been found to give good correlation with natural weathering for industrial
maintenance coatings.
© ISO 2016 – All rights reserved v
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oSIST prEN ISO 11997-1:2017
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oSIST prEN ISO 11997-1:2017
DRAFT INTERNATIONAL STANDARD ISO/DIS 11997-1.2:2016(E)
Paints and varnishes — Determination of resistance to cyclic
corrosion conditions — Part 1: Wet (salt fog)/dry/humidity
1 Scope
This part of ISO 11997 specifies a method for the determination of the resistance of coatings to one of four
defined cycles of wet (salt fog)/dry/humidity conditions using specified solutions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and
testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and designation
system
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of blistering
ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking
ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of
delamination and corrosion around a scribe or other artificial defect
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 17872:2007, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on
metallic panels for corrosion testing
© ISO 2016 – All rights reserved 1
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oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
3 Principle
A coated test panel is exposed to a cyclic wet (salt fog), drying and humidity test schedule and the effects of
exposure are evaluated by criteria agreed in advance between the interested parties, these criteria usually
being of a subjective nature.
4 Salt fog test solution
Prepare the salt fog test solution by dissolving the salt or salts as given in Annexes A, B, C and Din water
conforming to at least grade 2 of ISO 3696, to produce the required concentration.
The salts shall be of analytical grade and conform with the purity requirements given in Table 1.
Table 1 — Purity of salts
Maximum mass
fraction of impurity
Impurity Method of determination
%
Total 0,5 Calculated as a percentage of the dry salt
Iodide 0,1 Calculated as a percentage of the dry salt
Copper 0,001 Determined by spectrophotometry or another method of similar accuracy
Nickel 0,001 Determined by spectrophotometry or another method of similar accuracy
If the pH of the solution is outside the required range (see Annexes A, B, C and D), the presence of
undesirable impurities in the salt or the water or both shall be investigated. The pH determination shall be
based on electrometric measurement at 25 °C, but a narrow-range indicator paper which can be read in
increments of 0,3 pH-units or less and which has been calibrated against electrometric measurements may be
used in routine checks. Any necessary corrections shall be made by adding hydrochloric acid, sodium
hydrogen carbonate (both of purity conforming to the requirements of Table 1) or analytical-grade sodium
hydroxide, of appropriate concentrations.
NOTE Attention is draw n to the possible changes in pH resulting from loss of carbon dioxide from the solution w hen it
is sprayed, or from dissolution of carbon dioxide from the ambient atmosphere. Such changes may be avoided by
reducing the carbon dioxide content of the solution by, for example, heating it to a temperature above 35 °C before it is
placed in the cabinet or making the solution from freshly boiled w ater.
Filter the solution before placing it in the reservoir of the cabinet, in order to remove any solid matter which
might block the apertures of the spraying device.
5 Apparatus
Ordinary laboratory apparatus and glassware, together with the following:
5.1 Spray cabinet, made of, or lined with, material resistant to corrosion by the sprayed solution and
having a roof which prevents condensed moisture dripping onto the test specimens. The cabinet shall have a
3
capacity of not less than 0,4 m in order to ensure even distribution of the spray.
The size and shape of the cabinet shall be such that the salt fog deposition rate is within the limits given in
Annexes A, B, C and D.
3
NOTE Cabinets with a volume greater than 2 m will be difficult to operate unless careful consideration is given to
their design and construction.
Factors to be taken into consideration in the design and construction of the cabinet are given in Annex E.
2 © ISO 2016 – All rights reserved
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oSIST prEN ISO 11997-1:2017
ISO/DIS 11997-1.2:2016(E)
If the cabinet has been used for a spray test, or for any other purpose, using a solution differing from that
specified for the current test cycle, it shall be thoroughly cleaned before use.
5.2 Hot-air blowers, capable of maintaining the cabinet and its contents at the specified temperatures and
achieving the required heating rates (see Annexes A, B, C and D). The temperature shall be controlled by a
thermostat element placed within the cabinet at least 100 mm from the walls of the cabinet.
5.3 Means for spraying the salt solution, comprising a supply of clean compressed air at a controlled
pressure, a reservoir to contain the solution to be sprayed, and one or more atomizers made of material
resistant to the solution. The compressed-air supply to each atomizer shall be passed through a filter to
remove all traces of oil or solid matter, shall be at a suitable pressure depending upon the type of atomizer
nozzle and shall be adjusted so that the rate of collection of spray in the cabinet and the concentration of the
collected spray are kept within the specified limits (see Annexes A, B, C and D).
The reservoir containing the solution to be sprayed shall be a tank made of material resistant to the solution
and shall be provided with means of maintaining a constant flow of solution to the atomizers.
The atomizers shall be made of inert material, for example glass or plastic.
NOTE Baffles may be used to prevent direct impingement of spray on the test specimens, and the use of adjustable
baffles is helpful in obtaining uniform distribution of spray throughout the cabinet.
5.4 Drying-air supply, of 20 % to 30 % relative humidity for cycles A and D (see Annexes A and D) and of
(50 ± 20) % relative humidity for cycles B and C (see Annexes B and C). The air shall be passed through a
filter to remove all traces of oil or solid matter and shall have a flow rate sufficient to ensure that, at the start of
a dry phase, no drops of moisture are visible on the panels after the drying time specified for cycles A and D
and after 45 min to 75 min for cycle B. The panels shall not be dried by heaters inside the cabinet walls.
NOTE It is common practice to vent the cabinet to the atmosphere outside the laboratory.
5.5 Collecting devices, at least two, of chemically inert material (see Note). The collecting devices shall be
placed in the zone of the cabinet where the test panels are placed, one close to the spray atomizer(s) and one
remote from the spray atomizer(s). They shall be placed so that only spray and not liquid falling from test
panels or from parts of the cabinet is collected. If two or more atomizers are used, the number of collecting
devices shall be at least twice the number of atomizers.
NOTE Glass funnels with the stems inserted into graduated cylinders have been found to be suitable collecting
2
devices. Funnels w ith a diameter of 100 mm have a collecting area of approximately 80 cm .
5.6 Test panel racks, made of inert non-metallic material such as glass, plastic or suitably coated wood.
Exceptionally, test panels may be suspended. In this case, the material used shall be synthetic fibre, cotton
thread or other inert insulating material; on no account shall metallic material be used. All racks shall be
placed at the same level in the cabinet so that the solution cannot drip from panels or racks at one level onto
other pane
...
SLOVENSKI STANDARD
oSIST prEN ISO 11997-1:2014
01-december-2014
%DUYHLQODNL±8JRWDYOMDQMHRGSRUQRVWLSURWLFLNOLþQLPNRUR]LMVNLPSRJRMHP±
GHO 0RNUR VODQDPHJOD VXKRYODåQR ,62',6
Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1:
Wet (salt fog)/dry/humidity (ISO/DIS 11997-1:2014)
Beschichtungsstoffe - Bestimmung der Beständigkeit bei zyklischen
Korrosionsbedingungen - Teil 1: Nass (Salzsprühnebel)/trocken/Feuchte (ISO/DIS 11997
-1:2014)
Peintures et vernis - Détermination de la résistance aux conditions de corrosion cyclique
- Partie 1: Brouillard salin/sécheresse/humidité (ISO/DIS 11997-1:2014)
Ta slovenski standard je istoveten z: prEN ISO 11997-1
ICS:
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 11997-1:2014 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 11997-1:2014
---------------------- Page: 2 ----------------------
oSIST prEN ISO 11997-1:2014
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11997-1
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2014-09-25 2015-02-25
Paints and varnishes — Determination of resistance to
cyclic corrosion conditions —
Part 1:
Wet (salt fog)/dry/humidity
Peintures et vernis — Détermination de la résistance aux conditions de corrosion cyclique —
Partie 1: Brouillard salin/sécheresse/humidité
ICS: 87.040
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11997-1:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
---------------------- Page: 3 ----------------------
oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1:2014(E)
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
electronic, photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2014 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Principle. 2
4 Salt fog test solution . 2
5 Apparatus . 2
6 Sampling. 3
7 Test panels . 4
8 Method of exposure of test panels . 4
9 Operating conditions . 5
10 Procedure . 5
11 Examination of test panels . 5
12 Precision. 6
13 Test report . 6
Annex A (informative) Factors to be considered in the design and construction
of salt spray cabinets . 8
Annex B (normative) Cycle A . 9
Annex C (normative) Cycle B . 10
Annex D (normative) Cycle C . 11
Annex E (normative) Cycle D . 12
© ISO 2014 – All rights reserved iii
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oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11997-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
General test methods for paints and varnishes.
This third edition cancels and replaces the second edition (ISO 11997-1:2005), which has been technically
revised. The main technical changes are:
a) the time for no drops of moisture are visible on the panels (former 6.4, now 5.4) has been changed;
b) a reference to ISO 4628-8 for assessment of degree of delamination and corrosion around a scribe or
other artificial defect has been added;
c) the supplementary test conditions previously in Annex A have been integrated in the test report;
d) the numbering of Annexes C to F has been changed to B to E.
ISO 11997 consists of the following parts, under the general title Paints and varnishes — Determination of
resistance to cyclic corrosion conditions:
Part 1: Wet (salt fog)/dry/humidity
Part 2: Wet (salt fog)/dry/humidity/UV light
iv © ISO 2014 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1
Introduction
Coatings of paints, varnishes and similar materials are exposed to one of four cycles of wet and dry conditions
using specified salt solutions in a cabinet in order to simulate, in the laboratory, processes occurring in
aggressive outdoor conditions, such as marine environments. Generally, correlation between such outdoor
weathering and laboratory testing cannot be expected because of the large number of factors influencing the
breakdown process. Correlation can only be expected if the effect on the coating of important parameters (e.g.
the nature of the pollutant, the spectral distribution of the incident irradiance in the relevant photochemical
region, the temperature of the specimen, the type and cycle of wetting and relative humidity) is known. In
contrast to outdoor weathering, laboratory testing in a cabinet is performed with a reduced number of
variables which can be controlled, and therefore the effects are more reproducible. The method described
may also give a means of checking that the quality of a paint or paint system is being maintained.
The method has been found to be useful in comparing the cyclic salt spray resistance of different coatings. It
is most useful in providing relevant ratings for a series of coated panels exhibiting significant differences in
cyclic salt spray resistance.
The test cycles included in this part of ISO 11997 have been used successfully, with documented evidence, in
the industry for the assessment of performance. The cycles can be summarized as follows.
Cycle A (see Annex B): This cycle is specified in Japanese Automobile Standards JASO M 609-91,
Corrosion test method for automotive materials, and JASO M610-92, Cosmetic corrosion test method for
automotive parts.
Cycle B (see Annex C): This is based on the VDA 621-415 cycle and is widely used in Europe. It has
also been shown to give good correlation with natural weathering for thermosetting paints in vehicle
corrosion.
Cycle C (see Annex D): This cycle was developed in the UK for use with water-soluble and latex paint
systems, and has been shown to give good correlation with natural weathering.
Cycle D (see Annex E): This cycle is specified in Japanese Standard JIS K 5621-2003, Anticorrosive
paint for general use.
It is intended that other cycles will be added at later revisions of this part of ISO 11997, as they are developed
for evaluating other paint types.
ISO 11997-2 describes a method for determining the cyclic corrosion resistance of paints which includes UV
exposure as part of the cycle. It has been found to give good correlation with natural weathering for industrial
maintenance coatings.
© ISO 2014 – All rights reserved v
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oSIST prEN ISO 11997-1:2014
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oSIST prEN ISO 11997-1:2014
DRAFT INTERNATIONAL STANDARD ISO/DIS 11997-1
Paints and varnishes — Determination of resistance to cyclic
corrosion conditions — Part 1: Wet (salt fog)/dry/humidity
1 Scope
This part of ISO 11997 describes a method for the determination of the resistance of coatings to one of four
defined cycles of wet (salt fog)/dry/humidity conditions using specified solutions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and
testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and designation
system
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of blistering
ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking
ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of
delamination and corrosion around a scribe or other artificial defect
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
© ISO 2014 – All rights reserved
1
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oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1
3 Principle
A coated test panel is exposed to a cyclic wet (salt fog), drying and humidity test schedule and the effects of
exposure are evaluated by criteria agreed in advance between the interested parties, these criteria usually
being of a subjective nature.
4 Salt fog test solution
Prepare the salt fog test solution by dissolving the salt or salts as given in Annexes B, C, D and E in water
conforming to at least grade 2 of ISO 3696, to produce the required concentration.
The salts shall be of analytical grade or visually white, and conform with the purity requirements given in
Table 1.
Table 1 — Purity of salts
Maximum mass
fraction of impurity
Impurity Method of determination
%
Total 0,5 Calculated as a percentage of the dry salt
Iodide 0,1 Calculated as a percentage of the dry salt
Copper 0,001 Determined by spectrophotometry or another method of similar accuracy
Nickel 0,001 Determined by spectrophotometry or another method of similar accuracy
If the pH of the solution is outside the required range (see Annexes B, C, D and E), the presence of
undesirable impurities in the salt or the water or both shall be investigated. The pH determination shall be
based on electrometric measurement at 25 °C, but a narrow-range indicator paper which can be read in
increments of 0,3 pH-units or less and which has been calibrated against electrometric measurements may be
used in routine checks. Any necessary corrections shall be made by adding hydrochloric acid, sodium
hydrogen carbonate (both of purity conforming to the requirements of Table 1) or analytical-grade sodium
hydroxide, of appropriate concentrations.
NOTE Attention is drawn to the possible changes in pH resulting from loss of carbon dioxide from the solution when it
is sprayed, or from dissolution of carbon dioxide from the ambient atmosphere. Such changes may be avoided by
reducing the carbon dioxide content of the solution by, for example, heating it to a temperature above 35 °C before it is
placed in the cabinet or making the solution from freshly boiled water.
Filter the solution before placing it in the reservoir of the cabinet, in order to remove any solid matter which
might block the apertures of the spraying device.
5 Apparatus
Ordinary laboratory apparatus and glassware, together with the following:
5.1 Spray cabinet, made of, or lined with, material resistant to corrosion by the sprayed solution and
having a roof which prevents condensed moisture dripping onto the test specimens. The cabinet shall have a
3
capacity of not less than 0,4 m in order to ensure even distribution of the spray.
The size and shape of the cabinet shall be such that the salt fog deposition rate is within the limits given in
Annexes B, C, D and E.
3
NOTE Cabinets with a volume greater than 2 m will be difficult to operate unless careful consideration is given to
their design and construction.
Factors to be taken into consideration in the design and construction of the cabinet are given in Annex A.
© ISO 2014 – All rights reserved
2
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oSIST prEN ISO 11997-1:2014
ISO/DIS 11997-1
If the cabinet has been used for a spray test, or for any other purpose, using a solution differing from that
specified for the current test cycle, it shall be thoroughly cleaned before use.
5.2 Hot-air blowers, capable of maintaining the cabinet and its contents at the specified temperatures and
achieving the required heating rates (see Annexes B, C, D and E). The temperature shall be controlled by a
thermostat element placed within the cabinet at least 100 mm from the walls of the cabinet.
5.3 Means for spraying the salt solution, comprising a supply of clean compressed air at a controlled
pressure, a reservoir to contain the solution to be sprayed, and one or more atomizers made of material
resistant to the solution. The compressed-air supply to each atomizer shall be passed through a filter to
remove all traces of oil or solid matter, shall be at a suitable pressure depending upon the type of atomizer
nozzle and shall be adjusted so that the rate of collection of spray in the cabinet and the concentration of the
collected spray are kept within the specified limits (see Annexes B, C, D and E).
The reservoir containing the solution to be sprayed shall be a tank made of material resistant to the solution
and shall be provided with means of maintaining a constant flow of solution to the atomizers.
The atomizers shall be made of inert material, for example glass or plastic.
NOTE Baffles may be used to prevent direct impingement of spray on the test specimens, and the use of adjustable
baffles is helpful in obtaining uniform distribution of spray throughout the cabinet.
5.4 Drying-air supply, of 20 % to 30 % relative humidity for cycles A and D (see Annexes B and E) and of
(50 ± 20) % relative humidity for cycles B and C (see Annexes C and D). The air shall be passed through a
filter to remove all traces of oil or solid matter and shall have a flow rate sufficient to ensure that, at the start of
a dry phase, no drops of moisture are visible on the panels after th
...
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