SIST EN ISO 10289:2002

Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289:1999)

Migrated from Progress Sheet (TC Comment) (2000-07-10): N 201: New TD (980917)

Verfahren zur Korrosionsprüfung von metallischen und anderen anorganischen Überzügen auf metallischen Grundwerkstoffen - Bewertung der Proben und Erzeugnisse nach einer Korrosionsprüfung (ISO 10289:1999)

In dieser Internationalen Norm ist ein Bewertungsverfahren für den Zustand von Platten oder Erzeugnissen mit dekorativem und schützendem metallischem und anorganischem Überzug, die zu Prüfzwecken korrodierenden Medien ausgesetzt wurden, festgelegt. Es gilt für Prüfplatten oder Bauteile, die im bewegten oder ruhendem Zustand der natürlichen Atmosphäre oder beschleunigten Prüfungen ausgesetzt werden.

Méthodes d'essai de corrosion des revetements métalliques et inorganiques sur substrats métalliques - Cotation des éprouvettes et des articles manufacturés soumis aux essais de corrosion (ISO 10289:1999)

La présente Norme internationale propose une méthode d'évaluation de l'état des panneaux ou articles recouverts d'un revêtement métallique et inorganique décoratif et protecteur, et qui dans le cadre d'un essai ou dans d'autres circonstances, ont été exposés à des environnements corrosifs.  Elle est applicable aux panneaux ou articles d'essai exposés à des atmosphères naturelles, dans des conditions mobiles ou statiques ou soumis à des essais de corrosion accélérée.  
NOTE 1 Des exemples de ces essais sont donnés parmi les normes citées en bibliographie.  La présente Norme internationale s'appuie sur le fait que la cotation de la protection peut être évaluée sur des critères relativement objectifs conformément à l'article 6. Cependant, l'évaluation de l'aspect fait intervenir de nombreux facteurs subjectifs (voir 6.2).  
NOTE 2 Il est possible de protéger les rives des panneaux ou composants à essayer, au moyen, par exemple, de ruban adhésif ou de cire (paraffine), à condition que cela ait fait l'objet d'un accord entre les parties et ait été consigné dans le rapport d'essai. Ceci est particulièrement important pour les éprouvettes découpées dans des panneaux, et qui comportent de ce fait des rives non revêtues.

Metode za korozijsko preskušanje kovinskih in drugih anorganskih prevlek na kovinskih podlagah - Vrednotenje vzorcev in izdelkov po korozijskem preskusu (ISO 10289:1999)

General Information

• Status: Published
• Publication Date: 28-Feb-2002
• ICS: 25.220.20 - Surface treatment
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2002
• Due Date: 01-Mar-2002
• Completion Date: 01-Mar-2002
• Ref Project: EN ISO 10289:2001 - Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (ISO 10289:1999)

Relations

• Replaces: SIST EN ISO 1462:1999 - Metallic coatings - Coatings other than those anodic to the basis metal - Accelerated corrosion tests - Method for the evaluation of the results (ISO 1462:1973)
• Effective Date: 01-Mar-2002
• Replaces: SIST EN ISO 8403:1999 - Metallic coatings - Coatings anodic to the substrate - Rating of test specimens subjected to corrosion tests (ISO 8403:1991)
• Effective Date: 01-Mar-2002
• Replaces: SIST EN ISO 4540:1999 - Metallic coatings - Coatings cathodic to the substrate - Rating of electroplated test specimens subjected to corrosion tests (ISO 4540:1980)
• Effective Date: 01-Mar-2002

Overview

EN ISO 10289:2001 (ISO 10289:1999) defines a standardized method to rate corrosion damage on decorative and protective metallic and other inorganic coatings applied to metallic substrates. Adopted by CEN, the standard covers visual inspection, classification of defects and a two-part rating system - a protection rating (Rp) for substrate corrosion and an appearance rating (RA) for coating deterioration. It applies to test panels and manufactured articles exposed to natural atmospheres (including saline/marine conditions) or to accelerated laboratory exposures.

Key topics

• Two-part performance rating
  • Protection rating (Rp): a numerical score that relates to the percentage area of substrate corrosion (tabulated in the standard).
  • Appearance rating (RA): letter/number symbols describing the type and degree of visible coating deterioration.
• Types of defects assessed (examples): staining/colour change, dulling, corrosion products (anodic or cathodic), pitting, flaking/peeling/spalling, blistering, cracking, crazing and star-shaped (“crow’s feet”) defects.
• Inspection method and reporting
  • Identify and mark the significant surface(s) to be rated.
  • Inspect under uniform lighting; use minimal compatible cleaning only when necessary.
  • Record both rating values and the defect symbols/extent if required. Annexes include dot charts and colour photographs to aid assessment.
• Objective and subjective elements
  • Rp is based on area of substrate attack and may be determined from tabulated ranges or chart aids.
  • RA includes subjective description of deterioration (very slight, slight, moderate, excessive) alongside area-based scoring.
• Practical considerations
  • Edge effects, contact/rack marks and protected edges are treated specifically; the coating system and whether it is anodic or cathodic to the base metal should be reported.

Applications and users

EN ISO 10289 is used by:

• Coatings manufacturers for product performance validation and R&D.
• Corrosion testing laboratories for consistent rating and reporting of test specimens.
• Quality control and inspection teams in automotive, aerospace, architectural, marine and general industrial sectors.
• Material and corrosion engineers, procurement/specification writers and certification bodies who need reproducible, comparable assessments of coating performance after exposure or accelerated corrosion testing.

Benefits include consistent communication of test outcomes, reproducible evaluation criteria for acceptance/rejection, and support for comparative performance claims.

Related standards

• Adopted as EN ISO 10289:2001 by CEN.
• This edition cancels ISO 1462, ISO 4540 and ISO 8403 (earlier methods).
• Informative annexes (A & B) supply dot charts and photographs to support visual assessment.

Keywords: corrosion testing, metallic coatings, inorganic coatings, protection rating, appearance rating, corrosion inspection, EN ISO 10289, coating assessment, substrate corrosion.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2002
1DGRPHãþD
SIST EN ISO 1462:1999
SIST EN ISO 4540:1999
SIST EN ISO 8403:1999
Metode za korozijsko preskušanje kovinskih in drugih anorganskih prevlek na
kovinskih podlagah - Vrednotenje vzorcev in izdelkov po korozijskem preskusu
(ISO 10289:1999)
Methods for corrosion testing of metallic and other inorganic coatings on metallic
substrates - Rating of test specimens and manufactured articles subjected to corrosion
tests (ISO 10289:1999)
Verfahren zur Korrosionsprüfung von metallischen und anderen anorganischen
Überzügen auf metallischen Grundwerkstoffen - Bewertung der Proben und Erzeugnisse
nach einer Korrosionsprüfung (ISO 10289:1999)
Méthodes d'essai de corrosion des revetements métalliques et inorganiques sur
substrats métalliques - Cotation des éprouvettes et des articles manufacturés soumis
aux essais de corrosion (ISO 10289:1999)
Ta slovenski standard je istoveten z: EN ISO 10289:2001
ICS:
25.220.20 Površinska obdelava Surface treatment
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
IS0
STANDARD
First edition
1999-1 0-1 5
Methods for corrosion testing of metallic
and other inorganic coatings on metallic
substrates - Rating of test specimens and
manufactured articles subjected to
corrosion tests
Méthodes d'essai de corrosion des revêtements métalliques et
inorganiques sur substrats métalliques - Cotation des éprouvettes et des
articles manufacturés soumis aux essais de corrosion
Reference number
IS0 10289:1999( E)
IS0 10289:1999(E)
Contents Page
1 Scope . . . . . . . . . . . . . . . . . . . . . . 1
2 Terms and definitions . . . . , . . . . . . . . . 1
3 Principle . . . . . . . . . . . 2
4 Types of defect . . . . . . . . . . . . . . . . . . . . . 2
5 Method of inspection . . . . . . . . . . . . . . . . . . 3
6 Assignment of ratings . . . . . . . . . . . . . . . . . . . . . 3
7 Test report . . . . . . . . . . . . . . . . . . . . . . . 5
Annex A (informative) Dot charts and colour photographs for coatings cathodic to the basis metal . 7
Annex B (informative) Dot charts for coatings anodic to the basis metal . 17
Bibliography . . . . . . . . . . . . 22
O IS0 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 CH-121 1 Genève 20 Switzerland
Internet [e-mail]
Printed in Switzerland
ii
O IS0 IS0 10289: 1999(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0
member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 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 3.
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 IS0 10289 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic
coatings, Subcommittee SC 7, Corrosion tests.
This first edition cancels and replaces IS0 1462:1973, IS0 4540:1980 and IS0 8403:1991.
Annexes A and B of this International Standard are for information only.
iii
IS0 10289:1999(E) O IS0
Introduction
The rating method described in this International Standard recognizes that decorative and protective metallic and
inorganic coatings on metallic substrates can be either anodic or cathodic to the substrate. In rating these coatings
for the effects of corrosion, two evaluations shall be made:
- the ability of the coating to protect the substrate from corrosion and thus prevent degradation of the base metal;
- the ability of the coating to retain its integrity and thus maintain a satisfactory appearance.
Although these functions overlap, they can be evaluated separately in terms of:
- a protection rating (Rp) relating to the corrosion of the basis metal;
- an appearance rating (RA) relating to the deterioration of the coating.
The protection rating (Rp) assigns a number representing the ability of the coating to protect the basis metal from
corrosion.
The appearance rating (RA) assigns a sequence of letters and numbers to the overall appearance of the specimen
which includes all deterioration caused by the corrosion test or environment.
NOTE 1 Imperfections on a panel or article before exposure testing should be noted and given due consideration when
evaluating the results of the examination. Deliberate imperfections may also be introduced as part of a test programme.
The coating system has to be known and reported if this rating system is applied. It is especially important to know,
if possible, whether the coating is anodic or cathodic to the base metal.
NOTE 2 Determination of the anodic and cathodic corrosive mechanisms can be extremely difficult in some cases
(chromated zinc on steel or multiple coatings). For the purposes of this document knowledge of these mechanisms is not
necessary.
iv
INTERNATIONAL STANDARD O IS0 IS0 10289: 1999( E)
Methods for corrosion testing of metallic and other inorganic
coatings on metallic substrates - Rating of test specimens and
manufactured articles subjected to corrosion tests
1 Scope
This International Standard gives a method of evaluating the condition of decorative and protective metallic and
inorganic coated panels or articles which have been exposed to corrosive environments for test or for other
purposes.
It is applicable to test panels or components exposed to natural atmospheres, in mobile or static conditions, or
subjected to accelerated tests.
NOTE 1 Examples of such tests are given in the Bibliography.
This International Standard recognizes that the protection rating can be assessed objectively in accordance with
clause 6. However, the assessment of appearance depends on many subjective factors (see 6.2).
NOTE 2 The edges of test panels or components may be protected, e.g. by tape or wax (paraffin), if this is an agreed part of
the test and is recorded in the test report. This is essential if the specimens are cut from larger pieces and have exposed
uncoated edges.
2 Terms and definitions
2.1
protection rating
RP
rating number (see Table 1) assigned to the ability of the coating to protect the basis metal from corrosion
2.2
protection defect
defect used to assess the protection rating, including crater corrosion, pin-hole corrosion, corrosion stain due to
corrosion from the substrate, blisters and other defects that involve basis metal corrosion
Blisters on electroplated aluminium and zinc alloy die castings usually signify base metal corrosion, but the
NOTE
inspector’s judgement may be required to decide whether a blister does or does not arise at the substrate-coating interface.
2.3
appearance rating
RA
rating number and symbols (see Table 2) assigned to describe the overall appearance of the specimen, including all
defects caused by exposure
2.4
appearance defect
defect that detracts from the appearance of the specimen (see Table 2)
IS0 10289: 1 999( E)
O IS0
2.5
performance rating
combination of the protection rating number (Rp) followed by a slash mark followed by the appearance rating
number (RA), i.e. RdRA
2.6
coating system
particular series of deposits including the thickness and type of layers in multilayer deposits and treatments which
have been applied to the basis metal
2.7
significant surface
part of the surface which is essential in the appearance or serviceability of the article and which is to be covered or
is covered by the coating (see clause 5)
3 Principle
This International Standard establishes a rating system for evaluating the deterioration of the coating and the basis
metal due to corrosion. The rating method described in this International Standard is applied to evaluate the
appearance of the coating, as well the extent of the corrosion on test panels or the significant surfaces of
components which have been subjected to performance tests.
The result of inspecting a surface, called the performance rating, is recorded as two separate ratings, the protection
rating (Rp) and the appearance rating (RA).
When recording the rating of a surface, the type(s) and severity of defect(s) contributing to the rating shall be noted
if this information is required. This information is recorded using agreed symbols for the defects and the extent of
these defects.
When only the protection rating (Rp) is required, it is permitted to omit the appearance rating (RA). However, in such
a case, a written dash should follow the protection rating in order to indicate deliberate omission of the appearance
rating .
4 Types of defect
It is possible for defects to affect both the protection rating (Rp) and the appearance rating (RA). In this rating
system, the protection rating is a simple numerical rating while the appearance rating is permitted to include specific
defects along with a numerical rating designating the intensity.
A list of defects is given in Table 2. Additions may also be made to the list, as appropriate, when recording specific
defects.
Defects include crater corrosion, pin-hole corrosion, general corrosion of the coating, corrosion products, blisters,
and any other defect that involves the coating. Some defects, such as blisters, can be associated with the coating,
the basis metal, the interface between the coating and the basis metal, or between layers in the coating.
Other defects can have a small corrosion content but an appreciable affect on the appearance, e.g., staining,
tarnishing, cracks, etc.
Defects on the surface of the basis metal such as scratches, porosity, non-conducting inclusions, roll and die marks,
cold shuts and cracks can adversely affect the performance of coatings applied thereto, despite the observance of
the best finishing practices. Such defects shall be reported and rated separately.
Ensure that the coating system is reported, because the significance of certain defects can be dependent on
whether the coating is anodic or cathodic to the basis metal.
Note defects that develop on exposure, e.g. peeling or spalling of the coating, since this indicates possible improper
preparation of the basis metal or improper application of the coating.
O IS0 IS0 10289:1999(E)
5 Method of inspection
Use drawings or suitably marked samples to indicate the significant surface.
It may sometimes be necessary or appropriate to expose material which is defective in certain respects before
carrying out environmental testing. In such cases, make an inspection and record the findings before the specimens
are tested.
If deliberate damage is applied to a surface, record the damage before the specimens are tested and so reported. If
the specimen is purposely deformed, rate the deformed areas separately.
Material may be inspected either on the exposure racks or in a more suitable location. Ensure that lighting during
inspection is as uniform as possible; avoid direct reflection from sun or clouds, and use various angles of inspection
to ensure that all defects are revealed.
At the conclusion of the test, if the condition of the specimens allows, inspect them in the uncleaned condition. If dirt,
salt deposits, etc., mask the defects and create difficulties with inspection, the surface may be sponged with a mild
soap solution and then rinsed with water. However, exert no pressure during such cleanin
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