SIST EN ISO 12944-6:2018
(Main)Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)
Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)
This document specifies laboratory test methods and test conditions for the assessment of paint
systems for the corrosion protection of carbon steel structures.
The test results are intended to be considered as an aid in the selection of suitable paint systems and
not as exact information for determining durability.
This document covers protective paint systems designed for application to uncoated steel, hot dip
galvanized steel according to ISO 1461 and steel surfaces with thermal-sprayed metallic coating
according to ISO 2063-1 and ISO 2063-2.
This document does not apply to protective paint systems for electroplated or painted steel.
The environments for corrosivity categories C2 to C5 and Im1 to Im3 defined in ISO 12944-2 are
considered.
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme - Teil 6: Laborprüfungen zur Bewertung von Beschichtungssystemen (ISO 12944-6:2018)
Dieser Teil von ISO 12944 legt Laborprüfverfahren und Prüfbedingungen für die Bewertung von Beschich-tungssystemen für den Korrosionsschutz von Stahlbauten fest.
Die Prüfergebnisse werden als Hilfsmittel zur Auswahl von geeigneten Beschichtungssystemen angesehen und nicht als genaue Angaben zur Bestimmung der Schutzdauer.
Dieser Teil von ISO 12944 gilt für Beschichtungssysteme für unbeschichteten Stahl, feuerverzinkten Stahl nach ISO 1461 und Stahloberflächen mit thermisch gespritzten Metallüberzügen nach ISO 2063.
Dieser Teil von ISO 12944 gilt nicht für Beschichtungssysteme für galvanisierten oder beschichteten Stahl.
Es werden die in ISO 12944 2 festgelegten Umgebungsbedingungen für die Korrosivitätskategorien C2 bis C5 und Im1 bis Im3 berücksichtigt.
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture - Partie 6: Essais de performance en laboratoire (ISO 12944-6:2018)
ISO 12944-6:2018 spécifie des méthodes et des conditions d'essais en laboratoire pour l'évaluation des systèmes de peinture pour la protection contre la corrosion des structures en acier.
Les résultats d'essai sont destinés à être considérés comme une aide dans le choix des systèmes de peinture appropriés et non comme des informations exactes permettant de déterminer la durabilité.
ISO 12944-6:2018 couvre les systèmes de peinture anticorrosion conçus pour être appliqués sur acier non revêtu, sur acier galvanisé au trempé à chaud conformément à l'ISO 1461 et sur acier métallisé par projection thermique conformément à l'ISO 2063‑1 et l'ISO 2063‑2.
ISO 12944-6:2018 ne s'applique pas aux systèmes de peinture anticorrosion pour acier électroplaqué ou peint.
Les environnements de catégories de corrosivité C2 à C5 et Im1 à Im3 définis dans l'ISO 12944‑2 sont pris en compte.
Barve in laki - Protikorozijska zaščita jeklenih konstrukcij z zaščitnimi premaznimi sistemi - 6. del: Laboratorijske preskusne metode (ISO 12944-6:2018)
Ta dokument določa laboratorijske preskusne metode in preskusne pogoje za ocenjevanje premaznih sistemov za korozijsko zaščito jeklenih konstrukcij.
Rezultati preskusa naj bi šteli kot pomoč pri izbiri primernih zaščitnih premaznih sistemov in
ne kot natančne informacije za določitev trajnosti.
Ta dokument zajema zaščitne premazne sisteme, namenjene nanosu na nepremazano jeklo, vroče pocinkano jeklo v skladu s standardom ISO 1461 in jeklene površine s termično razpršenim kovinskim premazom v skladu s standardoma ISO 2063-1 in ISO 2063-2.
Ta dokument se ne uporablja za zaščitne premazne sisteme za galvansko ali lakirano jeklo.
Upoštevana so okolja za kategorije korozivnosti od C2 do C5 in od Im1 do Im3, določene v standardu ISO 12944-2.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12944-6:2018
01-april-2018
1DGRPHãþD
SIST EN ISO 12944-6:1998
%DUYHLQODNL3URWLNRUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO /DERUDWRULMVNHSUHVNXVQHPHWRGH ,62
Paints and varnishes - Corrosion protection of steel structures by protective paint
systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 6: Laborprüfungen zur Bewertung von Beschichtungssystemen (ISO 12944-6:2018)
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture -
Partie 6: Essais de performance en laboratoire (ISO 12944-6:2018)
Ta slovenski standard je istoveten z: EN ISO 12944-6:2018
ICS:
25.220.20 Površinska obdelava Surface treatment
87.040 Barve in laki Paints and varnishes
91.080.13 Jeklene konstrukcije Steel structures
SIST EN ISO 12944-6:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12944-6:2018
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SIST EN ISO 12944-6:2018
EN ISO 12944-6
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 87.020 Supersedes EN ISO 12944-6:1998
English Version
Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 6: Laboratory
performance test methods (ISO 12944-6:2018)
Peintures et vernis - Anticorrosion des structures en Beschichtungsstoffe - Korrosionsschutz von
acier par systèmes de peinture - Partie 6: Essais de Stahlbauten durch Beschichtungssysteme - Teil 6:
performance en laboratoire (ISO 12944-6:2018) Laborprüfungen zur Bewertung von
Beschichtungssystemen (ISO 12944-6:2018)
This European Standard was approved by CEN on 22 January 2018.
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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12944-6:2018 E
worldwide for CEN national Members.
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SIST EN ISO 12944-6:2018
EN ISO 12944-6:2018 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 12944-6:2018
EN ISO 12944-6:2018 (E)
European foreword
This document (EN ISO 12944-6:2018) 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 August 2018, and conflicting national standards shall
be withdrawn at the latest by August 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 12944-6:1998.
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 12944-6:2018 has been approved by CEN as EN ISO 12944-6:2018 without any
modification.
3
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SIST EN ISO 12944-6:2018
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SIST EN ISO 12944-6:2018
INTERNATIONAL ISO
STANDARD 12944-6
Second edition
2018-01
Paints and varnishes — Corrosion
protection of steel structures by
protective paint systems —
Part 6:
Laboratory performance test methods
Peintures et vernis — Anticorrosion des structures en acier par
systèmes de peinture —
Partie 6: Essais de performance en laboratoire
Reference number
ISO 12944-6:2018(E)
©
ISO 2018
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SIST EN ISO 12944-6:2018
ISO 12944-6:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 12944-6:2018
ISO 12944-6:2018(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 3
4.1 Relationship between artificial ageing and natural exposure . 3
4.2 Additional performance tests . 3
5 Tests . 3
5.1 Test panels . 3
5.1.1 Carbon steel . 3
5.1.2 Hot dip galvanized steel . 3
5.1.3 Thermal-sprayed metallic coatings . 4
5.2 Sampling of paints . 4
5.3 Number of test panels . 4
5.4 Paint systems . 4
5.5 Reference system . 4
5.6 Test procedures and duration . 4
6 Paint system assessment. 6
6.1 General . 6
6.2 Assessment before artificial ageing . 6
6.3 Assessment after artificial ageing for the specified time. 6
7 Test report . 7
Annex A (normative) Scribe line for ISO 9227 test and ISO 12944-9 cyclic ageing test .9
Annex B (normative) Cyclic ageing test .11
Bibliography .12
© ISO 2018 – All rights reserved iii
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SIST EN ISO 12944-6:2018
ISO 12944-6:2018(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: www.iso.org/iso/foreword.html.
This document was prepared by Technical committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 14, Protective paint systems for steel structures.
This second edition cancels and replaces the first edition (ISO 12944-6:1998), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the normative references have been updated;
— the terms and definitions have been revised;
— 4.2 “Additional performance tests” has been revised and the Note deleted;
— 5.1 “Test panels” has been revised;
— 5.4 “Paint systems” has been revised and requirements for maximum film thickness added;
— 5.6 “Test procedures and duration” has been revised and includes a revised Table 1;
— Table 1 “Test procedures for paint systems applied to carbon steel, hot dip galvanized steel or steel
with thermal-sprayed metallic coating” has been divided into two separate tables, one containing
categories C1 to C5 and one containing categories Im1 to Im3;
— the former Table 2 has been deleted;
— Clause 6 “Paint system assessment” has been revised;
— in 6.2 a new Table 3 “Assessment before artificial ageing” has been included;
— in 6.3 a new Table 4 “Assessment after artificial ageing for the specified time” has been included;
— in Clause 7 “Test report” the following items were added: “photographic documents […]”, “thickness
of zinc layer […]”, and “thickness of the thermal-sprayed metallic coating […]”;
iv © ISO 2018 – All rights reserved
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SIST EN ISO 12944-6:2018
ISO 12944-6:2018(E)
— Annex A has been revised and Figures A.1 and A.2 have been added;
— a new normative Annex B “Cyclic ageing test” has been added;
— the former Annex B has been deleted;
— a Bibliography has been added;
— the text has been editorially revised.
A list of all parts in the ISO 12944 series can be found on the ISO website.
© ISO 2018 – All rights reserved v
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SIST EN ISO 12944-6:2018
ISO 12944-6:2018(E)
Introduction
Unprotected steel in the atmosphere, in water and in soil is subject to corrosion that can lead to
damage. Therefore, to avoid corrosion damage, steel structures are normally protected to withstand
the corrosion stresses to which they will be subjected during the service life required of the structure.
There are different ways of protecting steel structures from corrosion. ISO 12944 (all parts) deals with
protection by paint systems and covers, in the various parts, all features that are important in achieving
adequate corrosion protection. Additional or other measures are possible but require particular
agreement between the interested parties.
In order to ensure effective corrosion protection of steel structures, owners of such structures, planners,
consultants, companies carrying out corrosion protection work, inspectors of protective coatings
and manufacturers of coating materials need to have at their disposal state-of-the-art information in
concise form on corrosion protection by paint systems. It is vital that such information is as complete as
possible, unambiguous and easily understandable to avoid difficulties and misunderstandings between
the parties concerned with the practical implementation of protection work.
ISO 12944 (all parts) is intended to give this information in the form of a series of instructions. It is
written for those who have some technical knowledge. It is also assumed that the user of ISO 12944 (all
parts) is familiar with other relevant International Standards, in particular those dealing with surface
preparation.
Although ISO 12944 (all parts) does not deal with financial and contractual questions, attention is
drawn to the fact that, because of the considerable implications of inadequate corrosion protection,
non-compliance with requirements and recommendations given in this document can result in serious
financial consequences.
ISO 12944-1 defines the overall scope of ISO 12944. It gives some basic terms and definitions and a
general introduction to the other parts of ISO 12944. Furthermore, it includes a general statement on
health, safety and environmental protection, and guidelines for using ISO 12944 (all parts) for a given
project.
This document provides a way of assessing paint systems by means of laboratory tests in order to be
able to select the most suitable.
Cyclic ageing testing according to Annex B is introduced within this document. It is currently used in C5
VH/ H and C4 VH. In case of C5 H and C4 VH the test regime including salt spray and condensation test
can still be used as alternative to cyclic ageing test. For the future, it is intended to remove salt spray
and condensation tests as alternative tests for C5 H and C4 VH.
vi © ISO 2018 – All rights reserved
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SIST EN ISO 12944-6:2018
INTERNATIONAL STANDARD ISO 12944-6:2018(E)
Paints and varnishes — Corrosion protection of steel
structures by protective paint systems —
Part 6:
Laboratory performance test methods
1 Scope
This document specifies laboratory test methods and test conditions for the assessment of paint
systems for the corrosion protection of carbon steel structures.
The test results are intended to be considered as an aid in the selection of suitable paint systems and
not as exact information for determining durability.
This document covers protective paint systems designed for application to uncoated steel, hot dip
galvanized steel according to ISO 1461 and steel surfaces with thermal-sprayed metallic coating
according to ISO 2063-1 and ISO 2063-2.
This document does not apply to protective paint systems for electroplated or painted steel.
The environments for corrosivity categories C2 to C5 and Im1 to Im3 defined in ISO 12944-2 are
considered.
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 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 2063-1, Thermal spraying — Zinc, aluminium and their alloys — Part 1: Design considerations and
quality requirements for corrosion protection systems
ISO 2063-2, Thermal spraying — Zinc, aluminium and their alloys — Part 2: Execution of corrosion
protection systems
ISO 2409, Paints and varnishes — Cross-cut test
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2812-2, Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion method
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning
and testing
ISO 4624, Paints and varnishes — Pull-off test for adhesion
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 2018 – All rights reserved 1
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SIST EN ISO 12944-6:2018
ISO 12944-6:2018(E)
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 — Par
...
SLOVENSKI STANDARD
oSIST prEN ISO 12944-:2017
01-junij-2017
%DUYHLQODNL.RUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO /DERUDWRULMVNHSUHVNXVQHPHWRGH ,62',6
Paints and varnishes - Corrosion protection of steel structures by protective coating
systems - Part 6: Laboratory performance test methods (ISO/DIS 12944-6:2017)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 6: Laborprüfungen zur Bewertung von Beschichtungssystemen (ISO/DIS 12944-
6:2017)
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture -
Partie 6: Essais de performance en laboratoire (ISO/DIS 12944-6:2017)
Ta slovenski standard je istoveten z: prEN ISO 12944-6
ICS:
25.220.20 Površinska obdelava Surface treatment
87.040 Barve in laki Paints and varnishes
91.080.13 Jeklene konstrukcije Steel structures
oSIST prEN ISO 12944-:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 12944-:2017
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oSIST prEN ISO 12944-:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12944-6
ISO/TC 35/SC 14 Secretariat: DIN
Voting begins on: Voting terminates on:
2017-04-17 2017-07-09
Paints and varnishes — Corrosion protection of steel
structures by protective coating systems —
Part 6:
Laboratory performance test methods
Peintures et vernis — Anticorrosion des structures en acier par systèmes de revêtement —
Partie 6: Essais de performance en laboratoire
ICS: 87.020
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
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 12944-6:2017(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 2017
---------------------- Page: 3 ----------------------
oSIST prEN ISO 12944-:2017
ISO/DIS 12944-6:2017(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
---------------------- Page: 4 ----------------------
oSIST prEN ISO 12944-:2017
ISO/DIS 12944-6:2017(E)
38B26B26B27BContents Page
39B27B27B28BForeword .iv
4B4B4B4BIntroduction .v
1 5B5B5B5BScope.1
2 6B6B6B6BNormative references .1
3 7B7B7B7BDefinitions .2
4 8B8B8B8BGeneral .3
4.1 12B12B12B12BRelationship between artificial ageing and natural exposure.3
4.2 14B13B13B13BAdditional performance tests .3
5 9B9B9B9BTests .3
5.1 15B14B14B14BTest panels .3
5.1.1 35B24B24B25BCarbon steel substrates.3
5.1.2 36B25B25B26Hot dip galvanized steel substrates .3
5.2 16B15B15B15BSampling of paints .4
5.3 17B16B16B16BNumber of test panels .4
5.4 18B17B17B17BPaint systems .4
5.5 19B18B18B18BReference system .4
5.6 Test procedures and duration .4
6 21B22B23B24B25B26B27B28B29B30B10B10B10B10BPaint system assessment .6
6.1 31B20B20B20BGeneral .6
6.2 32B21B21B21B22BAssessment before artificial ageing .6
6.3 34B23B23B24BAssessment after artificial ageing for the specified time .7
7 11B11B11B11BTest report .9
Annex A 2B2B2B2B(normative) Scribe line for ISO 9227 test and ISO 12944-9 cyclic test . 10
A.1 0B0B0B0BProducing the scribe . 10
A.2 1B1B1B1BAssessment of corrosion at scribe . 11
Annex B 3B3B3B3B(informative) Example of report form . 12
37BBibliography . 14
© ISO 2017 – All rights reserved iii
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oSIST prEN ISO 12944-:2017
ISO/DIS 12944-6:2017(E)
39B27B27B28BForeword
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.
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.
International Standard ISO 12944-6 was prepared by Technical Committee ISO/TC 35, Paints and varnishes,
Subcommittee SC 14, Protective paint systems for steel structures.
ISO 12944 consists of the following parts, under the general title Paints and varnishes — Protective paint
systems for steel structures:
Part 1: General introduction
Part 2: Classification of environments
Part 3: Design considerations
Part 4: Types of surface and surface preparation
Part 5: Protective paint systems
Part 6: Laboratory performance test methods
Part 7: Execution and supervision of paint work
Part 8: Development of specifications for new work and maintenance
Part 9: Protective paint systems and laboratory performance test methods for offshore and related
structures
Annex A of this part of ISO 12944 forms an integral part of this part of ISO 12944. Annex B is for
information only.
iv © ISO 2017 – All rights reserved
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oSIST prEN ISO 12944-:2017
ISO/DIS 12944-6:2017(E)
4B4B4B4BIntroduction
Unprotected steel in the atmosphere, in water and in soil is subject to corrosion that may lead to damage.
Therefore, to avoid corrosion damage, steel structures are normally protected to withstand the corrosion
stresses during the service life required of the structure.
There are different ways of protecting steel structures from corrosion. ISO 12944 deals with protection by
paint systems and covers, in the various parts, all features that are important in achieving adequate corrosion
protection. Additional or other measures are possible but require particular agreement between the interested
parties.
In order to ensure effective corrosion protection of steel structures, it is necessary for owners of such
structures, planners, consultants, companies carrying out corrosion protection work, inspectors of
protective coatings and manufacturers of coating materials to have at their disposal state-of-the-art
information in concise form on corrosion protection by paint systems. Such information has to be as complete
as possible, unambiguous and easily understandable to avoid difficulties and misunderstandings between the
parties concerned with the practical implementation of protection work.
This International Standard — ISO 12944 — is intended to give this information in the form of a series of
instructions. It is written for those who have some technical knowledge. It is also assumed that the user of
ISO 12944 is familiar with other relevant International Standards, in particular those dealing with surface
preparation, as well as relevant national regulations.
Although ISO 12944 does not deal with financial and contractual questions, attention is drawn to the fact that,
because of the considerable implications of inadequate corrosion protection, non-compliance with
requirements and recommendations given in this standard may result in serious financial consequences.
ISO 12944-1 defines the overall scope of all parts of ISO 12944. It gives some basic terms and definitions
and a general introduction to the other parts of ISO 12944. Furthermore, it includes a general statement on
health, safety and environmental protection, and guidelines for using ISO 12944 for a given project.
ISO 12944-6 provides a way of assessing paint systems by means of laboratory tests in order to be able
to select the most suitable.
Cyclic testing according to ISO 12944-9 is introduced within this edition of ISO 12944-6. It is currently used in
C5 VH/ H and C4 VH. In case of C5 H and C4 VH the test regime including salt spray and condensation test
can still be used as alternative to cyclic test. For the future it is intended to remove salt spray and
condensation tests as alternative tests for C5 H and C4 VH.
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oSIST prEN ISO 12944-:2017
ISO/DIS 12944-6 :2017(E)
Paints and varnishes — Corrosion protection of steel structures
by protective paint systems — Part 6: Laboratory performance
test methods
1 5B5B5B5BScope
This part of ISO 12944 specifies laboratory test methods and test conditions for the assessment of paint
systems for the corrosion protection of carbon steel structures.
The test results are to be considered as an aid in the selection of suitable paint systems and not as exact
information for determining durability.
This part of ISO 12944 covers protective paint systems designed for application to uncoated steel, hot dip
galvanized steel according to ISO 1461 and steel surfaces with thermal-sprayed metallic coating according to
ISO 2063.
This part of ISO 12944 does not apply to protective paint systems for electroplated or painted steel.
The environments for corrosivity categories C2 to C5 and Im1 to Im3 defined in ISO 12944-2 are considered.
2 6B6B6B6BNormative references
The following referenced documents are indispensable for the application 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 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
ISO 1513, Paints and varnishes — Examination and preparation of samples for testing
ISO 2063, Thermal spraying — Metallic and other inorganic coatings — Zinc, aluminium and their alloys
ISO 2409, Paints and varnishes — Cross-cut test
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2812-2, Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion
method
ISO 4624, Paints and varnishes — Pull-off test for adhesion
ISO 4628-1, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 1: General principles and rating schemes
ISO 4628-2, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 2: Designation of degree of blistering
ISO 4628-3, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 3: Designation of degree of rusting
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ISO 4628-4, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 4: Designation of degree of cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 5: Designation of degree of flaking
ISO 6270-1, Paints and varnishes — Determination of resistance to humidity — Part 1: Condensation (single-
sided exposure)
ISO 7384, Corrosion tests in artificial atmospheres — General requirements
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel
substrates and of steel substrates after overall removal of previous coatings
ISO 8503-1, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 1: Specifications and definitions for ISO
surface profile comparators for the assessment of abrasive blast-cleaned surfaces
ISO 8503-2, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 2: Method for the grading of surface
profile of abrasive blast-cleaned steel — Comparator procedure
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 12944-2:1998, Paints and varnishes — Corrosion protection of steel structures by protective paint
systems — Part 2: Classification of environments
ISO 12944-4, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 4: Types of surface and surface preparation
ISO 12944-5:1998, Paints and varnishes — Corrosion protection of steel structures by protective paint
systems — Part 5: Protective paint systems
ISO/DIS 12944-9, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 9: Protective paint systems and laboratory performance test methods for offshore and related
structures
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 19840, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Measurement of, and acceptance criteria for, the thickness of dry film on rough surfaces
3 7B7B7B7BDefinitions
For the purposes of this document, the terms and definitions given in ISO 12944 and the following apply.
3.1
artificial ageing
procedure designed to accelerate the ageing of a paint system, i.e. to reduce the corrosion-protective
efficiency more rapidly than by natural weathering
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4 8B8B8B8BGeneral
4.1 12B12B12B12BRelationship between artificial ageing and natural exposure
The selection of a paint system for a specific situation should preferably be based on experience from the use
of the system in similar cases. The reason is that the durability of a paint sys
...
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