EN ISO 4628-8:2005

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 (ISO 4628-8:2005)

ISO 4628-8:2005 specifies a method for assessing delamination and corrosion, caused by a corrosive environment, around a scribe in a coating on a test panel or other test specimen.

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 ausgehenden Enthaftung und Korrosion (ISO 4628-8:2005)

Dieser Teil von ISO 4628 legt ein Verfahren zum Bewerten von Enthaftung und Korrosion an einem Ritz in einer beschichteten Probenplatte oder eines anderen Probenkörpers fest, verursacht durch eine korrosive Umgebung.
ANMERKUNG      Ein Beispiel für eine korrosive Umgebung ist Salzsprühnebel, wie er bei der in ISO 9227 (siehe Literaturhinweise) beschriebenen Belastung angewendet wird.

Peintures et vernis - Evaluation 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: Evaluation du degré de décollement et de corrosion autour d'une rayure (ISO 4628-8:2005)

L'ISO 4628-8:2005 spécifie une méthode d'évaluation du décollement et de la corrosion se produisant autour d'une rayure, sur un panneau revêtu ou une éprouvette revêtue, en raison d'un environnement corrosif.

Barve in laki - Ovrednotenje propadanja premazov - Ugotavljanje obsega in velikosti poškodb ter intenzitete enakomernih sprememb videza - 8. del: Ocenjevanje stopnje luščenja in korozije ob rezu (ISO 4628-8:2005)

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-2005
• Withdrawal Date: 31-Oct-2012
• ICS: 87.040 - Paints and varnishes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Nov-2012
• Completion Date: 01-Nov-2012
• Ref Project: SIST EN ISO 4628-8:2005 - 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 (ISO 4628-8:2005)

Relations

• Replaced By: EN ISO 4628-8:2012 - 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)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2005
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YHOLNRVWLSRãNRGEWHULQWHQ]LWHWHHQDNRPHUQLKVSUHPHPEYLGH]DGHO
2FHQMHYDQMHVWRSQMHOXãþHQMDLQNRUR]LMHREUH]X,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 (ISO 4628-8:2005)
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 ausgehenden Enthaftung und
Korrosion (ISO 4628-8:2005)
Peintures et vernis - Evaluation de la dégradation des revetements - Désignation de la
quantité et de la dimension des défauts, et de l'intensité des changements uniformes
d'aspect - Partie 8: Evaluation du degré de décollement et de corrosion autour d'une
rayure (ISO 4628-8:2005)
Ta slovenski standard je istoveten z: EN ISO 4628-8:2005
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
March 2005
ICS 87.040
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 (ISO 4628-
8:2005)
Peintures et vernis - Evaluation 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: Evaluation du degré de décollement et Veränderungen im Aussehen - Teil 8: Bewertung der von
de corrosion autour d'une rayure (ISO 4628-8:2005) einem Ritz ausgehenden Enthaftung und Korrosion (ISO
4628-8:2005)
This European Standard was approved by CEN on 14 February 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4628-8:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 4628-8:2005) 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 September 2005, and conflicting national
standards shall be withdrawn at the latest by September 2005.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 4628-8:2005 has been approved by CEN as EN ISO 4628-8:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 4628-8
First edition
2005-03-01
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
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
Reference number
ISO 4628-8:2005(E)
©
ISO 2005
ISO 4628-8:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 4628-8:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Principle . 2
5 Procedure. 2
6 Calculation and expression of results . 4
7 Test report. 5
Bibliography . 7

ISO 4628-8:2005(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.
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
 Part 10: Assessment of degree of filiform corrosion
ISO 4628-1 defines the system to be used for designating the quantity and size of defects and the intensity of
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.
iv © ISO 2005 – All rights reserved

ISO 4628-8:2005(E)
Introduction
After exposure of a coated and scribed test panel in a corrosive environment, the following phenomena can
occur around the scribe:
 delamination;
 corrosion.
A combination of both phenomena can also occur.
It is recommended that delamination and corrosion around the scribe be evaluated separately to obtain more
detailed information about the coating system.
In addition to the procedure described in this part of ISO 4628, assessments of delamination and corrosion
around the scribe can be carried out using optical image processing.
Rating of other defects is described in other parts of ISO 4628.
INTERNATIONAL STANDARD ISO 4628-8:2005(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
1 Scope
This part of ISO 4628 specifies a method for assessing delamination and corrosion, caused by a corrosive
environment, around a scribe in a coating on a test panel or other test specimen.
NOTE An example of a corrosive environment is salt spray (fog) as used in the method of exposure described in
ISO 7253 or ISO 9227 (see the Bibliography).
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
ISO 21227-1, Paints and varnishes — Evaluation of defects on coated surfaces using optical imaging —
Part 1: General guidance
ISO 21227-3, Paints and varnishes — Evaluation of defects on coated surfaces using optical imaging —
Part 3: Assessment of delamination and corrosion around a scribe
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
corrosion
area of visible corrosion products
3.2
delamination
loss of adhesion of a coating
ISO 4628-8:2005(E)
4 Principle
The degree of delamination around a scribe is assessed either directly after the end of the exposure period
immediately after removal of the test panel from the exposure environment or after conditioning for a specified
period.
The degree of corrosion around the scribe is assessed either immediately after removal of the test panel from
the exposure environment or after removal of the coating.
Both the area of delamination and the area of corrosion are determined either by measurement and
calculation or by using pictorial standards.
NOTE The extent of other defects may also b
...