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 4628-8:2012)

ISO 4628-8:2012 specifies a method for assessing delamination and corrosion around a scribe or other artificial defect on a coated panel or other coated test specimen, caused by a corrosive environment.
ISO 4628-8:2012 does not cover evaluation of pitting corrosion or pit depth.

Beschichtungsstoffe - Beurteilung von Beschichtungsschäden - Beurteilung der Menge und der Größe von Schäden und der Intensität von gleichmäßigen Veränderungen im Aussehen - Teil 8: Bewertung der von einem Ritz oder einer anderen künstlichen Verletzung ausgehenden Enthaftung und Korrosion (ISO 4628-8:2012)

Dieser Teil von ISO 4628 legt ein Verfahren zum Bewerten von Enthaftung und Korrosion an einem Ritz oder einer anderen künstlichen Verletzung an einer beschichteten Probenplatte oder eines anderen Probenkörpers fest, verursacht durch eine korrosive Umgebung.
Dieser Teil von ISO 4628 gilt nicht zur Beurteilung von Lochkorrosion oder Lochtiefe.
ANMERKUNG 1   Beispiele für korrosive Umgebungen sind künstliche Atmosphären wie Salzsprühnebel, so wie in dem in ISO 9227[7] festgelegten Prüfverfahren, und Eintauchen in Meerwasser, so wie bei dem in ISO 15711[8] festgelegten Verfahren. Es können auch natürliche Umgebungen Anwendung finden.
ANMERKUNG 2   Das Ausmaß anderer Schäden kann zugleich mit der Enthaftung und der Korrosion bewertet werden. Die anzuwendenden Prüfverfahren sind:
-   Blasenbildung nach ISO 4628-2[2];
-   Rostbildung nach ISO 4628-3[3];
-   Rissbildung nach ISO 4628-4[4];
-   Abblättern nach ISO 4628-5[5];
-   Filiformkorrosion nach ISO 4628-10[6].

Peintures et vernis - Évaluation de la dégradation des revêtements - Désignation de la quantité et de la dimension des défauts, et de l'intensité des changements uniformes d'aspect - Partie 8: Évaluation du degré de décollement et de corrosion autour d'une rayure ou d'un autre défaut artificiel (ISO 4628-8:2012)

L'ISO 4628-8:2012 spécifie une méthode d'évaluation du décollement et de la corrosion autour d'une rayure ou autre défaut artificiel, sur un panneau revêtu ou une éprouvette revêtue, résultant d'un environnement corrosif.
L'ISO 4628-8:2012 ne couvre pas l'évaluation de la corrosion par piqûres ou de la profondeur des piqûres.

Barve in laki - Ovrednotenje propadanja premazov - Ugotavljanje obsega in velikosti poškodb ter intenzitete enakomernih sprememb videza - 8. del: Ocenjevanje stopnje luščenja in korozije ob zarezi ali drugi umetni poškodbi (ISO 4628-8:2012)

General Information

Status
Published
Public Enquiry End Date
19-Aug-2010
Publication Date
11-Mar-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Feb-2014
Due Date
02-May-2014
Completion Date
12-Mar-2014

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SLOVENSKI STANDARD
01-april-2014
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SIST EN ISO 4628-8:2005
%DUYHLQODNL2YUHGQRWHQMHSURSDGDQMDSUHPD]RY8JRWDYOMDQMHREVHJDLQ
YHOLNRVWLSRãNRGEWHULQWHQ]LWHWHHQDNRPHUQLKVSUHPHPEYLGH]DGHO
2FHQMHYDQMHVWRSQMHOXãþHQMDLQNRUR]LMHRE]DUH]LDOLGUXJLXPHWQLSRãNRGEL ,62

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 4628-8:2012)
Beschichtungsstoffe - Beurteilung von Beschichtungsschäden - Beurteilung der Menge
und der Größe von Schäden und der Intensität von gleichmäßigen Veränderungen im
Aussehen - Teil 8: Bewertung der von einem Ritz oder einer anderen künstlichen
Verletzung ausgehenden Enthaftung und Korrosion (ISO 4628-8:2012)
Peintures et vernis - Évaluation de la dégradation des revêtements - Désignation de la
quantité et de la dimension des défauts, et de l'intensité des changements uniformes
d'aspect - Partie 8: Évaluation du degré de décollement et de corrosion autour d'une
rayure ou d'un autre défaut artificiel (ISO 4628-8:2012)
Ta slovenski standard je istoveten z: EN ISO 4628-8:2012
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 4628-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2012
ICS 87.040 Supersedes EN ISO 4628-8:2005
English Version
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 4628-8:2012)
Peintures et vernis - Évaluation de la dégradation des
Beschichtungsstoffe - Beurteilung von
revêtements - Désignation de la quantité et de la dimension Beschichtungsschäden - Beurteilung der Menge und der
des défauts, et de l'intensité des changements uniformes Größe von Schäden und der Intensität von gleichmäßigen
d'aspect - Partie 8: Évaluation du degré de décollement et Veränderungen im Aussehen - Teil 8: Bewertung der von
de corrosion autour d'une rayure ou d'un autre défaut einem Ritz oder einer anderen künstlichen Verletzung
artificiel (ISO 4628-8:2012) ausgehenden Enthaftung und Korrosion (ISO 4628-8:2012)
This European Standard was approved by CEN on 5 October 2012.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4628-8:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 4628-8:2012) 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 May 2013, and conflicting national standards shall be withdrawn at the
latest by May 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4628-8:2005.
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4628-8:2012 has been approved by CEN as a EN ISO 4628-8:2012 without any modification.
INTERNATIONAL ISO
STANDARD 4628-8
Second edition
2012-11-01
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
Peintures et vernis — Évaluation de la dégradation des revêtements —
Désignation de la quantité et de la dimension des défauts, et de
l’intensité des changements uniformes d’aspect —
Partie 8: Évaluation du degré de décollement et de corrosion autour
d’une rayure ou d’un autre défaut artificiel
Reference number
ISO 4628-8:2012(E)
©
ISO 2012
ISO 4628-8:2012(E)
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 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
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 4628-8:2012(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 4628-8 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
General test methods for paints and varnishes.
This second edition cancels and replaces the first edition (ISO 4628-8:2005). For this revision:
a) the use of measurement and calculation to determine delamination and corrosion is preferred over the use
of pictorial standards;
b) artificial defects with shape other than a linear scribe mark are introduced.
ISO 4628 consists of the following parts, under the general title 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
— Part 2: Assessment of degree of blistering
— Part 3: Assessment of degree of rusting
— Part 4: Assessment of degree of cracking
— Part 5: Assessment of degree of flaking
— Part 6: Assessment of degree of chalking by tape method
— Part 7: Assessment of degree of chalking by velvet method
— Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect
— Part 10: Assessment of degree of filiform corrosion
ISO 4628-8:2012(E)
Introduction
[1]
ISO 4628-1 defines a system for designating the quantity and size of defects and the intensity of uniform
changes in appearance of coatings and outlines the general principles of the system. This system is intended
to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour
changes, for example yellowing.
The other parts of ISO 4628 provide pictorial standards or other means for evaluating particular types of defect.
As far as possible, already existing evaluation schemes have been used as the basis.
After exposure of a coated test panel with a scribe or other artificial defect in a corrosive environment, one, or
a combination of both of, the following phenomena can occur around the scribe or other artificial defect:
— delamination;
— corrosion.
Delamination and corrosion around the scribe or other artificial defect are evaluated separately to provide more
detailed information about the performance of a coating system in corrosive environments.
In addition to the procedure specified in this part of ISO 4628, assessments of delamination and corrosion
around the scribe or other artificial defect may be carried out using optical image processing.
Rating of other defects is described in other parts of ISO 4628.
iv © ISO 2012 – All rights reserved

INTERNATIONAL STANDARD ISO 4628-8:2012(E)
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
1 Scope
This part of ISO 4628 specifies a method for assessing delamination and corrosion around a scribe or other
artificial defect on a coated panel or other coated test specimen, caused by a corrosive environment.
This part of ISO 4628 does not cover evaluation of pitting corrosion or pit depth.
NOTE 1 Examples of corrosive environments are artificial atmospheres such as salt spray, as used in the test method
[7] [8]
specified in ISO 9227, and sea water immersion as used in the test method specified in ISO 15711. Natural environments
can also be used.
NOTE 2 The extent of other defects can also be determined at the same time as delamination and corrosion. Methods
are given as follows:
[2]
— blistering in accordance with ISO 4628-2;
[3]
— rusting in accordance with ISO 4628-3;
[4]
— cracking in accordance with ISO 4628-4;
[5]
— flaking in accordance with ISO 4628-5;
[6]
— filiform corrosion in accordance with ISO 4628-10.
2 Normative 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 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
holiday
absence of a paint film from certain areas of a coated substrate
3.2
artificial defect
holiday through a coating, deliberately introduced in order to expose the underlying metal substrate prior to
exposure to a corrosive environment
ISO 4628-8:2012(E)
3.3
circular defect
circular holiday through a coating, deliberately introduced in order to expose the underlying metal substrate
prior to exposure in a corrosive environment
3.4
corroded area
area around a defect where the substrate has been attacked by corrosion
3.5
delaminated area
area around a defect where loss of adhesion of a coating from a substrate or an underlying coating has occurred
3.6
scribe
linear holiday through a coating, deliberately introduced in order to expose the underlying metal substrate prior
to exposure in a corrosive environment
4 Principle
The delamination around a scribe or other artificial defect is assessed either directly at the end of the test period,
immediately after removal of the test panel from a previous conditioning environment, or after conditioning for
a specified period.
The corrosion around the scribe or other artificial defect is assessed either immediately after removal of the
test panel from a previous conditioning environment or after removal of the coating.
Both the degree of delamination and the degree of corrosion are determined by measurement and calculation.
5 Procedure
5.1 General
The assessment of delamination shall be made immediately after removal of the panels from the conditi
...

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