prEN ISO 4628-3
(Main)Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting (ISO/DIS 4628-3:2023)
Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting (ISO/DIS 4628-3:2023)
ISO 4628-3:2016 specifies a method for assessing the degree of rusting of coatings by comparison with pictorial standards.
The pictorial standards provided in this part of ISO 4628 show coated steel surfaces which have deteriorated to different degrees by a combination of rust broken through the coating and visible underrust.
NOTE 1 The pictorial standards have been selected from the "European rust scale" published by the European Confederation of Paint, Printing Ink and Artists' Colours Manufacturers' Associations (CEPE), Brussels. The correlation between the ISO scale and the "European rust scale" is given in Annex B, Table B.1.
NOTE 2 The correlation between the ISO scale and the rating system of ASTM D 610 is given in Annex B, Table B.2.
NOTE 3 The rust formation on uncoated steel surfaces is designated in accordance with ISO 8501‑1 (rust grades A, B, C, and D).
ISO 4628‑1 defines the system 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.
Beschichtungsstoffe - Beurteilung der Menge und der Größe von Schäden und der Intensität von gleichmäßigen Veränderungen im Aussehen - Teil3: Bewertung des Rostgrades (ISO/DIS 4628-3:2023)
Peintures et vernis - Évaluation de la quantité et de la dimension des défauts, et de l’intensité des changements uniformes d’aspect - Partie 3: Évaluation du degré d’enrouillement (ISO/DIS 4628-3:2023)
La présente partie de l'ISO 4628 spécifie une méthode d'évaluation du degré d'enrouillement de revêtements par comparaison avec des étalons illustrés.
Les étalons illustrés fournis dans la présente partie de l'ISO 4628 montrent des surfaces en acier revêtues, détériorées à différents degrés par l'association de rouille traversant le revêtement et de rouille sous-jacente apparente.
NOTE 1 Les étalons illustrés sont choisis dans «l'échelle européenne de degré d'enrouillement» publiée par la Confédération européenne des associations de fabricants de peintures, d'encres d'imprimerie et de couleurs d'art (CEPE), à Bruxelles. La correspondance entre l'échelle ISO et «l'échelle européenne de degré d'enrouillement» est indiquée dans l'Annexe B, Tableau B.1.
NOTE 2 La correspondance entre l'échelle ISO et le système d'évaluation de l'ASTM D 610 est donnée dans l'Annexe B, Tableau B.2.
NOTE 3 La formation de rouille sur des surfaces en acier non revêtues est désignée conformément à l'ISO 8501‑1 (degrés de rouille A, B, C et D).
L'ISO 4628‑1 définit un système de désignation de la quantité et de la dimension des défauts, ainsi que l'intensité des changements d'aspect intervenant sur les revêtements, et expose les principes généraux de ce système. Ce système est destiné à être utilisé, en particulier, pour les défauts causés par le vieillissement et les intempéries, ainsi que pour les changements uniformes tels que les changements de couleur, par exemple le jaunissement.
Barve in laki - Vrednotenje obsega in velikosti poškodb ter intenzitete enakomernih sprememb videza - 3. del: Ocenjevanje stopnje rjavenja (ISO/DIS 4628-3:2023)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2023
Barve in laki - Vrednotenje obsega in velikosti poškodb ter intenzitete
enakomernih sprememb videza - 3. del: Ocenjevanje stopnje rjavenja (ISO/DIS
4628-3:2023)
Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of
uniform changes in appearance - Part 3: Assessment of degree of rusting (ISO/DIS 4628
-3:2023)
Beschichtungsstoffe - Beurteilung der Menge und der Größe von Schäden und der
Intensität von gleichmäßigen Veränderungen im Aussehen - Teil3: Bewertung des
Rostgrades (ISO/DIS 4628-3:2023)
Peintures et vernis - Évaluation de la quantité et de la dimension des défauts, et de
l’intensité des changements uniformes d’aspect - Partie 3: Évaluation du degré
d’enrouillement (ISO/DIS 4628-3:2023)
Ta slovenski standard je istoveten z: prEN ISO 4628-3
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4628-3
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-08-28 2023-11-20
Paints and varnishes — Evaluation of quantity and
size of defects, and of intensity of uniform changes in
appearance —
Part 3:
Assessment of degree of rusting
ICS: 87.040
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
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ISO/DIS 4628-3:2023(E)
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 4628-3:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4628-3
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
Paints and varnishes — Evaluation of quantity and
size of defects, and of intensity of uniform changes in
appearance —
Part 3:
Assessment of degree of rusting
ICS: 87.040
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
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NATIONAL REGULATIONS.
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 4628-3:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations .2
5 Assessment of red rust .2
5.1 Method 1: Assessment of the degree of red rust by comparison with pictorial
standards (Ri) . 2
5.2 Method 2: Assessment of the degree of red rust by estimating the rusted area in
percent (R%) . 8
6 Assessment of white rust . 8
6.1 Method 1: Assessment of the degree of white rust by comparison with pictorial
standards (WRi) . 8
6.2 Method 2: Assessment of the degree of white rust by estimating the rusted area in
percent (WR%) . . 13
7 Expression of results .14
8 Test report .14
Annex A (normative) Calibration images .15
Annex B (normative) Example for degree of rusting after salt spray test .20
Annex C (informative) Correlation between the ISO rating system and other systems .21
Bibliography .22
iii
ISO/DIS 4628-3:2023(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes.
This fourth edition cancels and replaces the third edition (ISO 4628-3:2016), which has been technically
revised.
The main changes are as follows:
— the title has been shortened to “Paints and varnishes — Evaluation of quantity and size of defects,
and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting”;
— the scope has been opened for the evaluation of uncoated metal;
— a definition for white rust has been added;
— a note on the original size of the figures has been added to Clause 4;
— a table for designating the size of rusting has been added;
— the percentage of the rusted area in Figure A.5 has been corrected;
— the assessment of white rust together with new pictorial standards has been added;
— the assessment by estimating the rusted area in percent has been added;
— Annex B with an example for a test panel after ISO 9227 NSS salt spray test with a degree of rusting
Ri 4 has been added;
— the correlation with the ASTM rust scale in Annex C has been adjusted to the 2008 edition of
ASTM D610;
— the text has been revised editorially and the normative references have been updated.
A list of all parts in the ISO 4628 series can be found on the ISO website.
iv
ISO/DIS 4628-3:2023(E)
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
DRAFT INTERNATIONAL STANDARD ISO/DIS 4628-3:2023(E)
Paints and varnishes — Evaluation of quantity and
size of defects, and of intensity of uniform changes in
appearance —
Part 3:
Assessment of degree of rusting
1 Scope
This document specifies a method for assessing the degree of rusting of surfaces coated
— with paints and varnishes (organic coatings),
— with metallic coating plus an organic coating (duplex coating) and
— with metallic coatings only (e.g. hot-dip galvanized steel)
by comparison with pictorial standards.
The standard can also be used for bare metal surfaces.
The pictorial standards provided in this document show surfaces which have deteriorated to different
degrees by a combination of rust broken through the coating and visible under-rusting.
The assessing of the degree of rusting of this document is only an estimation of the affected area on
specimen. Edges are not included.
NOTE 1 The pictorial standards have been selected from the “European rust scale” published by the European
Confederation of Paint, Printing Ink and Artists' Colours Manufacturers' Associations (CEPE), Brussels. The
correlation between the ISO scale and the “European rust scale” is given in Annex C, Table C.1.
NOTE 2 The correlation between the ISO scale and the rating system of ASTM D610-08 is given in Annex C,
Table C.2.
ISO 4628-1 describes the system 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.
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 4618, Paints and varnishes — Terms and definitions
ISO 13076, Paints and varnishes — Lighting and procedure for visual assessments of coatings
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 4618 and the following apply.
ISO/DIS 4628-3:2023(E)
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
red rust
rating characterizing the degree of rust formation on uncoated iron/steel substrates or rust broken
through and visible under-rusting on coated substrates
Note 1 to entry: A typical red layer of corrosion products on an iron/steel substrate is formed. The red rust layer
is g
...
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