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
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Mar-2002
Due Date
01-Mar-2002
Completion Date
01-Mar-2002

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SLOVENSKI STANDARD
SIST EN ISO 10289:2002
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
SIST EN ISO 10289:2002 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10289:2002
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SIST EN ISO 10289:2002
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SIST EN ISO 10289:2002
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SIST EN ISO 10289:2002
INTERNATIONAL
IS0
STANDARD
10289
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)
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SIST EN ISO 10289:2002
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 iso@iso.ch
Printed in Switzerland
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SIST EN ISO 10289:2002
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
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SIST EN ISO 10289:2002
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.
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SIST EN ISO 10289:2002
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

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

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)
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SIST EN ISO 10289:2002
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.
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SIST EN ISO 10289:2002
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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