prEN ISO 4624

Paints and varnishes - Pull-off test for adhesion (ISO/DIS 4624:2022)

ISO 4624:2016 specifies three methods (i.e. one dolly or two dollies on a painted panel and two dollies, one as painted substrate) for determining the adhesion by carrying out a pull-off test on a single coating or a multi-coat system of paint, varnish or related product.
These test methods have been found useful in comparing the adhesion behaviour of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in adhesion.
The test may be applied using a wide range of substrates. Different procedures are given according to whether the substrate is deformable, for example thin metal, plastics and wood, or rigid, for example thick concrete and metal plates. To avoid distortion of the substrate during the tensile test, it is common to use a sandwich construction. For example, for special purposes, the coating may be applied directly to the face of a test dolly.

Beschichtungsstoffe - Abreißversuch zur Bestimmung der Haftfestigkeit (ISO/DIS 4624:2022)

Peintures et vernis - Essai de traction (ISO/DIS 4624:2022)

ISO 4624:2016 spécifie trois méthodes (par exemple un plot ou deux plots sur un panneau peint et deux plots, l'un étant utilisé comme subjectile peint d'essai) pour déterminer l'adhérence par un essai de traction sur une couche unique ou sur un système multicouche de peintures, vernis ou produits assimilés.
Ces méthodes d'essai se sont révélées utiles pour comparer l'adhérence de diverses couches. Elles sont surtout utiles pour fournir des classifications relatives pour une série de panneaux revêtus présentant des différences d'adhérence significatives.
L'essai peut être effectué sur une large variété de subjectiles. Différents modes opératoires sont présentés selon que le subjectile est déformable, par exemple métal, plastique et bois, ou rigide, par exemple béton épais et plaques de métal. Pour éviter la déformation du subjectile durant l'essai de traction, on utilise habituellement une construction en sandwich. Par exemple, pour des besoins particuliers, le revêtement peut être appliqué directement sur un plot d'essai.

Barve in laki - Preskušanje oprijema z odtrganjem filma (ISO/DIS 4624:2022)

General Information

• Status: Not Published
• Publication Date: 19-Dec-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 17-Jan-2023
• Completion Date: 17-Jan-2023
• Ref Project: oSIST prEN ISO 4624:2022 - Paints and varnishes - Pull-off test for adhesion (ISO/DIS 4624:2022)

Relations

• Revises: EN ISO 4624:2016 - Paints and varnishes - Pull-off test for adhesion (ISO 4624:2016)
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 4624:2022
01-november-2022
Barve in laki - Preskušanje oprijema z odtrganjem filma (ISO/DIS 4624:2022)
Paints and varnishes - Pull-off test for adhesion (ISO/DIS 4624:2022)
Beschichtungsstoffe - Abreißversuch zur Bestimmung der Haftfestigkeit (ISO/DIS
4624:2022)
Peintures et vernis - Essai de traction (ISO/DIS 4624:2022)
Ta slovenski standard je istoveten z: prEN ISO 4624
ICS:
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 4624:2022 en,fr,de

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

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oSIST prEN ISO 4624:2022
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oSIST prEN ISO 4624:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4624
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2022-09-05 2022-11-28
Paints and varnishes — Pull-off test for adhesion
Peintures et vernis — Essai de traction
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/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 4624:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 4624:2022
ISO/DIS 4624:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4624
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
Paints and varnishes — Pull-off test for adhesion
Peintures et vernis — Essai de traction
ICS: 87.040
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2022
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

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.

the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below

IN ADDITION TO THEIR EVALUATION AS

or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,

TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 4624:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
© ISO 2022 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 4624:2022
ISO/DIS 4624:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Apparatus .................................................................................................................................................................................................................... 2

6 Adhesives ..................................................................................................................................................................................................................... 5

7 Sampling ....................................................................................................................................................................................................................... 6

8 Test panels ..................................................................................................................................................................................................................6

8.1 Substrate ...................................................................................................................................................................................................... 6

8.2 Preparation and coating ................................................................................................................................................................ 6

8.3 Drying and conditioning ................................................................................................................................................................ 6

8.4 Thickness of coating .......................................................................................................................................................................... 6

9 Procedure ....................................................................................................................................................................................................................6

9.1 Number of determinations .......................................................................................................................................................... 6

9.2 Ambient conditions............................................................................................................................................................................. 6

9.3 Adhesive ....................................................................................................................................................................................................... 6

9.4 Test assemblies ....................................................................................................................................................................................... 7

9.4.1 Method A: General method (using two dollies) for testing both rigid and

deformable substrates .................................................................................................................................................. 7

9.4.2 Method B: Method for testing from one side only, using a single dolly

(suitable for rigid substrates only) .................................................................................................................... 7

9.4.3 Method C: Method using dollies, one as a painted substrate ...................................................... 8

9.5 Measurement ........................................................................................................................................................................................... 9

9.5.1 Breaking strength ............................................................................................................................................................. 9

9.5.2 Nature of the fracture .................................................................................................................................................... 9

10 Calculation and expression of results ........................................................................................................................................... 9

10.1 Breaking strength ............................................................................................................................................................................... 9

10.2 Nature of failure ................................................................................................................................................................................. 10

10.3 Example ..................................................................................................................................................................................................... 10

11 Precision ....................................................................................................................................................................................................................10

12 Test report ...............................................................................................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................12

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 4624:2022
ISO/DIS 4624:2022(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 4624:2016), which has been technically

revised.
The main changes are as follows:

— Clause 3 on terms and definitions has been added, including a normative reference to ISO 4618;

— additional information has been added to the single dolly method (9.4.2) that the test assembly shall

be so that the substrate cannot go out of shape;

— the text has been editorially revised and the normative references have been updated.

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.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 4624:2022
ISO/DIS 4624:2022(E)
Introduction

This document is one of two documents which describe methods for assessing the adhesion of a single

coating or a multi-coat system of paint, varnish or related product by measuring the minimum tensile

stress necessary to detach or to rupture the coating in a direction perpendicular to the substrate.

The test result is influenced not only by the mechanical properties of the system under test, but also by

the nature and preparation of the substrate, the method of paint application, the drying conditions of

the coating, the temperature, the humidity and other factors like the type of test instrument which has

been used.
One other document for the evaluation of adhesion characteristics is ISO 2409.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 4624:2022
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oSIST prEN ISO 4624:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 4624:2022(E)
Paints and varnishes — Pull-off test for adhesion
1 Scope

This document specifies three methods (i.e. one dolly or two dollies on a painted panel and two dollies,

one as painted substrate) for determining the adhesion by carrying out a pull-off test on a single coating

or a multi-coat system of paint, varnish or related product.

These test methods have been found useful in comparing the adhesion behaviour of different coatings.

It is most useful in providing relative ratings for a series of coated panels exhibiting significant

differences in adhesion.

The test may be applied using a wide range of substrates. Different procedures are given according to

whether the substrate is deformable, for example thin metal, plastics and wood, or rigid, for example

thick concrete and metal plates. To avoid distortion of the substrate during the tensile test, it is common

to use a sandwich construction. For example, for special purposes, the coating may be applied directly

to the face of a test dolly.
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 1513, Paints and varnishes — Examination and preparation of test samples
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness

ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning

and testing
ISO 4618, Paints and varnishes— Terms and definitions

ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 4618 apply.

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/
4 Principle

The product or system under test is applied at uniform thickness to flat panels of uniform surface

texture.

After drying/curing the coating system, dollies are bonded directly to the surface of the coated, cured

panel using an adhe
...