SIST EN ISO 8502-6:2020

Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 6: Extraction of water soluble contaminants for analysis (Bresle method) (ISO 8502-6:2020)

This document specifies a method of extracting, for analysis, water soluble contaminants from a surface by use of flexible cells in the form of adhesive patches or sleeves which can be attached to any surface, regardless of its shape (flat or curved) and its orientation (facing in any direction, including downwards).
The method described is suitable for use in the field to determine the presence of water soluble contaminants before painting or a similar treatment.
This document does not cover the subsequent analysis of the contaminants that have been dissolved.
Methods of analysis suitable for field use are described in other parts of ISO 8502.
NOTE The extraction method might give a false negative or not take all the water-soluble material off the surface because of: a) Soluble materials hiding in the crevices or under folds of metal; b) Soluble materials under corrosion layers, passivation layers produced by corrosion inhibitors, oil, grease, or other non-visible thin films.

Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Prüfungen zum Bewerten der Oberflächenreinheit - Teil 6: Lösen von wasserlöslichen Verunreinigungen zur Analyse - Bresle-Verfahren (ISO 8502-6:2020)

Dieses Dokument legt ein Verfahren zum Extrahieren von wasserlöslichen Verunreinigungen von einer Oberfläche zur Analyse fest, bei dem verformbare Zellen in Form von selbstklebenden Pflastern oder Hülsen verwendet werden, die auf jede Oberfläche, unabhängig von deren Form (eben oder gekrümmt) und Lage (in jeder Richtung, auch nach unten) geklebt werden können.
Das Verfahren ist als Feldverfahren geeignet, um wasserlösliche Verunreinigungen vor dem Beschichten oder ähnlichen Behandlungen zu bestimmen.
Dieses Dokument befasst sich nicht mit der anschließenden Analyse der gelösten Verunreinigungen. Analysenverfahren, die als Feldverfahren geeignet sind, werden in anderen Teilen von ISO 8502 beschrieben.
ANMERKUNG   Das Extraktionsverfahren könnte ein falschnegatives Ergebnis zur Folge haben oder nicht alle wasserlöslichen Stoffe von der Oberfläche lösen, da a) lösliche Stoffe sich in Spalten oder unter Faltungen des Metalls verbergen; b) lösliche Stoffe auch unter Korrosionsschichten, Passivierungsschichten, erzeugt durch Korrosions¬inhibitoren, Öl, Fett oder anderen nicht sichtbaren, dünnen Schichten sein können.

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Essais pour apprécier la propreté d'une surface - Partie 6: Extraction des contaminants solubles en vue de l'analyse (Méthode de Bresle) (ISO 8502-6:2020)

Le présent document spécifie une méthode d'extraction en surface, en vue de l'analyse, des contaminants solubles dans l'eau, au moyen de cellules souples telles que des pastilles adhésives ou des manchons qui peuvent être fixés sur toute surface, sans se soucier de leur forme (plate ou ronde) et de leur orientation (dans toutes les directions, y compris vers le bas).
La méthode décrite convient pour l'emploi in situ en vue de déterminer la présence de contaminants solubles dans l'eau avant de peindre ou d'effectuer un traitement similaire.
Le présent document ne traite pas de l'analyse consécutive des contaminants qui ont été dissous. Les méthodes d'analyse appropriées à l'emploi in situ sont décrites dans d'autres parties de l'ISO 8502.
NOTE    Il est possible que la méthode d'extraction donne un résultat faux négatif ou qu'elle ne permette pas d'extraire de la surface toutes les substances solubles dans l'eau, pour les raisons suivantes: a) Des substances solubles dissimulées dans des fissures ou sous des pliures de métal; b) Des substances solubles dissimulées sous les couches de corrosion, les couches de passivation produites par les inhibiteurs de corrosion, dans l'huile, la graisse, ou d'autres fines couches (films) invisibles.

Priprava jeklenih podlag pred nanašanjem barvnih in sorodnih premazov - Preskusi za ocenjevanje čistosti površine - 6. del: Ekstrakcija v vodi topnih nečistoč za analizo (Breslova metoda) (ISO 8502-6:2020)

General Information

• Status: Published
• Public Enquiry End Date: 03-Jul-2019
• Publication Date: 10-Jun-2020
• ICS: 25.220.10 - Surface preparation
• ICS: 87.020 - Paint coating processes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Jun-2020
• Due Date: 09-Aug-2020
• Completion Date: 11-Jun-2020
• Ref Project: EN ISO 8502-6:2020 - Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 6: Extraction of water soluble contaminants for analysis (Bresle method)(ISO 8502-6:2020)

Relations

• Replaces: SIST EN ISO 8502-6:2006 - Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 6: Extraction of soluble contaminants for analysis - The Bresle method (ISO 8502-6:2006)
• Effective Date: 01-Jul-2020

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 8502-6:2020
01-julij-2020
Nadomešča:
SIST EN ISO 8502-6:2006
Priprava jeklenih podlag pred nanašanjem barvnih in sorodnih premazov -
Preskusi za ocenjevanje čistosti površine - 6. del: Ekstrakcija v vodi topnih
nečistoč za analizo (Breslova metoda) (ISO 8502-6:2020)
Preparation of steel substrates before application of paints and related products - Tests
for the assessment of surface cleanliness - Part 6: Extraction of water soluble
contaminants for analysis (Bresle method) (ISO 8502-6:2020)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Prüfungen zum Bewerten der Oberflächenreinheit - Teil 6: Lösen von wasserlöslichen
Verunreinigungen zur Analyse - Bresle-Verfahren (ISO 8502-6:2020)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Essais pour apprécier la propreté d'une surface - Partie 6: Extraction des
contaminants solubles en vue de l'analyse (Méthode de Bresle) (ISO 8502-6:2020)
Ta slovenski standard je istoveten z: EN ISO 8502-6:2020
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
SIST EN ISO 8502-6:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 8502-6:2020

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SIST EN ISO 8502-6:2020


EN ISO 8502-6
EUROPEAN STANDARD

NORME EUROPÉENNE

May 2020
EUROPÄISCHE NORM
ICS 25.220.10 Supersedes EN ISO 8502-6:2006
English Version

Preparation of steel substrates before application of paints
and related products - Tests for the assessment of surface
cleanliness - Part 6: Extraction of water soluble
contaminants for analysis (Bresle method)(ISO 8502-
6:2020)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen
peintures et de produits assimilés - Essais pour von Beschichtungsstoffen - Prüfungen zum Bewerten
apprécier la propreté d'une surface - Partie 6: der Oberflächenreinheit - Teil 6: Lösen von
Extraction des contaminants solubles en vue de wasserlöslichen Verunreinigungen zur Analyse -
l'analyse (Méthode de Bresle) (ISO 8502-6:2020) Bresle-Verfahren (ISO 8502-6:2020)
This European Standard was approved by CEN on 1 May 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8502-6:2020 E
worldwide for CEN national Members.

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SIST EN ISO 8502-6:2020
EN ISO 8502-6:2020 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 8502-6:2020
EN ISO 8502-6:2020 (E)
European foreword
This document (EN ISO 8502-6:2020) 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 November 2020, and conflicting national standards
shall be withdrawn at the latest by November 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8502-6:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 8502-6:2020 has been approved by CEN as EN ISO 8502-6:2020 without any
modification.

3

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SIST EN ISO 8502-6:2020

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SIST EN ISO 8502-6:2020
INTERNATIONAL ISO
STANDARD 8502-6
Third edition
2020-04
Preparation of steel substrates before
application of paints and related
products — Tests for the assessment
of surface cleanliness —
Part 6:
Extraction of water soluble
contaminants for analysis (Bresle
method)
Préparation des subjectiles d'acier avant application de peintures
et de produits assimilés — Essais pour apprécier la propreté d'une
surface —
Partie 6: Extraction des contaminants solubles en vue de l'analyse
(Méthode de Bresle)
Reference number
ISO 8502-6:2020(E)
©
ISO 2020

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SIST EN ISO 8502-6:2020
ISO 8502-6:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 8502-6:2020
ISO 8502-6:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and materials. 2
6 Procedure. 3
6.1 Selection of test surface . 3
6.2 Blank test . 3
6.3 Extraction by patch or sleeve by injection . 3
6.4 Extraction by sleeve by pre-filling . 5
7 Analyses . 5
8 Test report . 5
Annex A (normative) Leak test for type testing of adhesive cells (patches and sleeves) .9
Bibliography .11
© ISO 2020 – All rights reserved iii

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SIST EN ISO 8502-6:2020
ISO 8502-6:2020(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 12, Preparation of steel substrates before application of paints and related products, . in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 139, Paints and
varnishes, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This third edition cancels and replaces the second edition (ISO 8502-6:2006), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— inclusion of the sleeve type extraction cells to be used with water extraction;
— specification that only water is used as a solvent for this method.
A list of all parts in the ISO 8502 series can be found on the ISO website.
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.
iv © ISO 2020 – All rights reserved

---------------------- Page: 10 ----------------------
SIST EN ISO 8502-6:2020
ISO 8502-6:2020(E)

Introduction
The performance of protective coatings of paint and related products applied to steel is significantly
affected by the state of the steel surface immediately prior to painting. The principal factors that are
known to influence this performance are:
a) the presence of rust and mill scale;
b) the presence of surface contaminants, including salts, dust, oils and greases;
c) the surface profile.
The ISO 8501 series, ISO 8502 series and ISO 8503 series have been prepared to provide methods of
assessing these factors, while ISO 8504 series provides guidance on the preparation methods that are
available for cleaning steel substrates, indicating the capabilities of each in attaining specified levels of
cleanliness.
These series of International Standards do not contain recommendations for the protective coating
systems to be applied to the steel surface. Neither do they contain recommendations for the surface
quality requirements for specific situations, even though surface quality can have a direct influence
on the choice of protective coating to be applied and on its performance. Such recommendations are
found in other documents such as national standards and codes of practice. Users of these International
Standards should ensure that the qualities specified are:
— compatible and appropriate both for the environmental conditions to which the steel will be exposed
and for the protective coating system to be used;
— within the capability of the cleaning procedure specified.
The four series of International Standards referred to above deal with the following aspects of
preparation of steel substrates:
— ISO 8501 covers the visual assessment of surface cleanliness;
— ISO 8502 covers the tests for the assessment of surface cleanliness;
— ISO 8503 covers the surface roughness characteristics of blast-cleaned steel substrates;
— ISO 8504 covers the surface preparation methods.
This document is one of many parts of ISO 8502 that specify tests for the assessment of surface
cleanliness. In relation to such tests, there are several methods for the extraction, for analysis, of
soluble contaminants on surfaces to be painted. One of these methods is based on the swabbing
of comparatively large test surfaces. This technique provides average values of the contamination
present, but it might conceal localized concentrations of contaminants. Also, swabbing might not ensure
sufficient penetration to dissolve all the deep-seated contamination such as ferrous salts.
There are other methods, however, which use small cells for the liquid used to remove and collect the
surface contaminants. The cells are attached to test surfaces where soluble contaminants could be
expected, e.g. where pitting has occurred and prevent loss of extraction solution from evaporate. This
closed cell technique usually provides more accurate, point values of the contamination present.
This document describes a simple, inexpensive field test using flexible cells in the form of adhesive cells
designed to be filled with water. The method was originally developed by a Swedish scientist, Dr. A.
Bresle, using one of the cell types included in this document.
© ISO 2020 – All rights reserved v

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SIST EN ISO 8502-6:2020

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SIST EN ISO 8502-6:2020
INTERNATIONAL STANDARD ISO 8502-6:2020(E)
Preparation of steel substrates before application of paints
and related products — Tests for the assessment of surface
cleanliness —
Part 6:
Extraction of water soluble contaminants for analysis
(Bresle method)
1 Scope
This document specifies a method of extracting, for analysis, water soluble contaminants from a
surface by use of flexible cells in the form of adhesive patches or sleeves which can be attached to any
surface, regardless of its shape (flat or curved) and its orientation (facing in any direction, including
downwards).
The method described is suitable for use in the field to determine the presence of water soluble
contaminants before painting or a similar treatment.
This document does not cover the subsequent analysis of the contaminants that have been dissolved.
Methods of analysis suitable for field use are described in other parts of ISO 8502.
NOTE The extraction method might give a false negative or not take all the water-soluble material off the
surface because of: a) Soluble materials hiding in the crevices or under folds of metal; b) Soluble materials under
corrosion layers, passivation layers produced by corrosion inhibitors, oil, grease, or other non-visible thin films.
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 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of su
...

SLOVENSKI STANDARD
oSIST prEN ISO 8502-6:2019
01-junij-2019
Priprava jeklenih podlag pred nanašanjem barvnih in sorodnih premazov -
Preskusi za ocenjevanje čistosti površine - 6. del: Ekstrakcija v vodi topnih
nečistoč za analizo - Breslova metoda (ISO/DIS 8502-6:2019)
Preparation of steel substrates before application of paints and related products - Tests
for the assessment of surface cleanliness - Part 6: Extraction of water soluble
contaminants for analysis - The Bresle method (ISO/DIS 8502-6:2019)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Prüfungen zum Bewerten der Oberflächenreinheit - Teil 6: Lösen von wasserlöslichen
Verunreinigungen zur Analyse; Bresle-Verfahren (ISO/DIS 8502-6:2019)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Essais pour apprécier la propreté d'une surface - Partie 6: Extraction des
contaminants solubles en vue de l'analyse - Méthode de Bresle (ISO/DIS 8502-6:2019)
Ta slovenski standard je istoveten z: prEN ISO 8502-6
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
oSIST prEN ISO 8502-6:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 8502-6:2019

---------------------- Page: 2 ----------------------
oSIST prEN ISO 8502-6:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8502-6
ISO/TC 35/SC 12 Secretariat: BSI
Voting begins on: Voting terminates on:
2019-05-09 2019-08-01
Preparation of steel substrates before application of paints
and related products — Tests for the assessment of surface
cleanliness —
Part 6:
Extraction of water soluble contaminants for analysis —
The Bresle method
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés — Essais pour
apprécier la propreté d'une surface —
Partie 6: Extraction des contaminants solubles en vue de l'analyse — Méthode de Bresle
ICS: 25.220.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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 8502-6:2019(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 2019

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oSIST prEN ISO 8502-6:2019
ISO/DIS 8502-6:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 8502-6:2019
ISO/DIS 8502-6:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and materials. 2
5.1 Adhesive cell. 2
5.2 Reusable syringe. 3
5.3 Solvent (water) . 3
5.4 Contact thermometer . 3
5.5 Container . 3
6 Procedure. 3
6.1 Selection of test surface . 3
6.2 Extraction by Patch or Sleeve by injection . 3
6.3 Extraction by Sleeve by pre-filling . 4
6.4 Blank test . 5
7 Analyses . 5
8 Test Report . 5
Annex A (normative) Leak test for type testing of adhesive cells (patches and sleeves) .9
Bibliography .11
© ISO 2019 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 8502-6:2019
ISO/DIS 8502-6:2019(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 12, Preparation of steel substrates before application of paints and related products.
This third edition cancels and replaces the second edition (ISO 8502-6:2006), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Inclusion of the Sleeve type extraction cells to be used with water extraction
— Only water is excepted as a solvent for this test. Other acidic solvents are covered in a new work item.
A list of all parts in the ISO 8502- series can be found on the ISO website.
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.
iv © ISO 2019 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 8502-6:2019
ISO/DIS 8502-6:2019(E)

Introduction
The performance of protective coatings of paint and related products applied to steel is significantly
affected by the state of the steel surface immediately prior to painting. The principal factors that are
known to influence this performance are:
a) the presence of rust and mill scale;
b) the presence of surface contaminants, including salts, dust, oils and greases;
c) the surface profile.
International Standards ISO 8501, ISO 8502 and ISO 8503 have been prepared to provide methods
of assessing these factors, while ISO 8504 provides guidance on the preparation methods that are
available for cleaning steel substrates, indicating the capabilities of each in attaining specified levels of
cleanliness.
These International Standards do not contain recommendations for the protective coating systems
to be applied to the steel surface. Neither do they contain recommendations for the surface quality
requirements for specific situations, even though surface quality can have a direct influence on the
choice of protective coating to be applied and on its performance. Such recommendations are found in
other documents such as national standards and codes of practice. It will be necessary for the users of
these International Standards to ensure that the qualities specified are:
— compatible and appropriate both for the environmental conditions to which the steel will be exposed
and for the protective coating system to be used;
— within the capability of the cleaning procedure specified.
The four International Standards referred to above deal with the following aspects of preparation of
steel substrates:
— ISO 8501 — Visual assessment of surface cleanliness;
— ISO 8502 — Tests for the assessment of surface cleanliness;
— ISO 8503 — Surface roughness characteristics of blast-cleaned steel substrates;
— ISO 8504 — Surface preparation methods.
Each of these International Standards is in turn divided into separate parts.
This is one of many parts of ISO 8502 that specify tests for the assessment of surface cleanliness.
Relating to such tests, there are several methods for the extraction, for analysis, of soluble contaminants
on surfaces to be painted. One of these methods is based on the swabbing of comparatively large test
surfaces. This technique provides average values of the contamination present, but it might conceal
localized concentrations of contaminants. Also, swabbing might not ensure sufficient penetration to
dissolve all the deep-seated contamination such as ferrous salts.
There are other methods, however, which use small cells for the liquid used to remove and collect the
surface contaminants. The cells are attached to test surfaces where soluble contaminants could be
expected, e.g. where pitting has occurred and prevent loss of extraction solution from evaporate. This
closed cell technique usually provides more accurate, point values of the contamination present.
This part of ISO 8502 describes a simple, inexpensive field test using flexible cells in the form of adhesive
cells designed to be filled with water. The method was originally developed by a Swedish scientist, Dr.
A. Bresle, using one of the cell types included in this standard.
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oSIST prEN ISO 8502-6:2019

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oSIST prEN ISO 8502-6:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 8502-6:2019(E)
Preparation of steel substrates before application of paints
and related products — Tests for the assessment of surface
cleanliness —
Part 6:
Extraction of water soluble contaminants for analysis —
The Bresle method
1 Scope
This part of ISO 8502 describes a method of extracting, for analysis, water soluble contaminants from
a surface by use of flexible cells in the form of adhesive patches or sleeves which can be attached to any
surface, regardless of its shape (flat or curved) and its orientation (facing in any direction, including
downwards).
The method described is suitable for use in the field to determine the presence of water soluble
contaminants before painting or a similar treatment.
This part of ISO 8502 does not cover the subsequent analysis of the contaminants that have been
dissolved off. Methods of analysis suitable for field use are described in other parts of ISO 8502.
NOTE The extraction method might give a false negative or not take all the water-soluble material off the
surface because of: (1) Soluble materials hiding in the crevices or under folds of metal; (2) Soluble materials under
corrosion layers, passivation layers produced by corrosion inhibitors, oil, grease, or other non-visible thin films.
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 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates
and of steel substrates after overall removal of previous coatings
ISO 8503-2, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 2: Method for the grading of surface
profile of abrasive blast-cleaned steel — Comparator procedure
ISO/IEC Guide 2, Standardization and related activities — General vocabulary
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
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