SIST-TP CEN ISO/TR 15235:2025

SLOVENSKI STANDARD
01-januar-2025
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Zbrane
informacije o vplivu stopnje onesnaženja s solmi, topnimi v vodi (ISO/TR
15235:2001)
Preparation of steel substrates before application of paints and related products -
Collected information on the effect of levels of water-soluble salt contamination (ISO/TR
15235:2001)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen und
verwandten Produkten - Gesammelte Informationen über die Auswirkungen der
Verunreinigung durch wasserlösliche Salze (ISO/TR 15235:2001)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Conseils sur les teneurs en contamination des sels solubles dans l'eau
(ISO/TR 15235:2001)
Ta slovenski standard je istoveten z: CEN ISO/TR 15235:2024
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN ISO/TR 15235
TECHNICAL REPORT
RAPPORT TECHNIQUE
October 2024
TECHNISCHER REPORT
ICS 25.220.10
English Version
Preparation of steel substrates before application of paints
and related products - Collected information on the effect
of levels of water-soluble salt contamination (ISO/TR
15235:2001)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen
peintures et de produits assimilés - Conseils sur les von Beschichtungsstoffen und verwandten Produkten -
teneurs en contamination des sels solubles dans l'eau Gesammelte Informationen über die Auswirkungen der
(ISO/TR 15235:2001) Verunreinigung durch wasserlösliche Salze (ISO/TR
15235:2001)
This Technical Report was approved by CEN on 27 October 2024. It has been drawn up by the Technical Committee CEN/TC 139.

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United Kingdom.
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CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TR 15235:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO/TR 15235:2001 has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" of the International Organization for Standardization (ISO) and has been taken over as
which is held by DIN.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
Endorsement notice
The text of ISO/TR 15235:2001 has been approved by CEN as CEN ISO/TR 15235:2024 without any
modification.
TECHNICAL ISO/TR
REPORT 15235
First edition
2001-10-15
Preparation of steel substrates before
application of paints and related
products — Collected information on the
effect of levels of water-soluble salt
contamination
Préparation des subjectiles d'acier avant application de peintures et de
produits assimilés — Conseils sur les teneurs en contamination des sels
solubles dans l'eau
Reference number
ISO/TR 15235:2001(E)
©
ISO 2001
ISO/TR 15235:2001(E)
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ii © ISO 2001 – All rights reserved

ISO/TR 15235:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Conclusions .1
3 Terms and definitions .2
4 Sequential collection of data.2
5 Protocol for assessing surface contamination .5
6 Recommended test protocol to investigate the influence of salt contamination on coating
service life .5
7 Other standards of interest .5
Annex A (informative) Summary of data from bibliographic references.6
Annex B (informative) Data from a paint manufacturer.14
Annex C (informative) Coating-system manufacturers' recommendations regarding toleration of salt
contamination on a steel surface before application of paints or related products .16
Annex D (informative) Data supplied by Japan (see 4.2) .19
Annex E (informative) Assessment of soluble chloride and/or sulfate contamination on a steel
surface — Surface inspection protocol.21
Annex F (informative) Recommended test procedure when investigating the influence of soluble
chloride and/or sulfate contamination on coating service life .22
Bibliography.23

ISO/TR 15235:2001(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 3.
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.
In exceptional circumstances, when a technical committee has collected data of a different kind from that which is
normally published as an International Standard ("state of the art", for example), it may decide by a simple majority
vote of its participating members to publish a Technical Report. A Technical Report is entirely informative in nature
and does not have to be reviewed until the data it provides are considered to be no longer valid or useful.
Attention is drawn to the possibility that some of the elements of this Technical Report may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TR 15235 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.
iv © ISO 2001 – All rights reserved

ISO/TR 15235:2001(E)
Introduction
The performance of paints and related products applied to steel can be significantly affected by the presence of
water-soluble salt contaminants on a steel surface.
Sources of salt contamination are numerous. In the painting industry, the blasting abrasive itself, the paint
ingredients (particularly pigments), and the rinse water that may be used in wet cleaning methods can all be
sources of salt contamination. In addition, salts settle from the atmosphere during fogs, dews, inversions, and rain,
and they may also be deposited from chemical splashes or air pollutants. De-icing salts, which are used on
highways and bridges in cold climates, may remain on the steel surfaces. Furthermore, some steel surfaces, during
service, come into direct contact with salts, e.g. ships carrying salt water ballast in steel tanks or vessels with salt-
containing cargoes.
Unless salts are removed from a steel surface prior to painting, problems may occur that lead to poor paint
performance. Salts on the steel surface can absorb moisture from the air, cause osmotic blistering of the paint
system, and accelerate the rate of corrosion.
Removal of salts is often difficult, and the salts accelerate pitting corrosion. The salt contaminant can remain in the
bottom of pits, often beneath the corrosion product. In order to adequately remove salts from the surface, it is often
necessary not only to remove the corrosion product, but also to flush the salt from within the corrosion pits.
The performance of a paint system applied over a salt-contaminated surface depends on the service environment,
the type and design of the paint system, the thickness of the paint, and the nature and amount of salt
contaminants.
International Standards ISO 8501 and ISO 8502 have been prepared to provide methods of assessing visually or
by chemical analysis the presence and surface concentration of contaminants, and ISO 8504 provides guidance on
methods for cleaning steel surfaces. These International Standards, however, do not contain guidance on the
levels of salt contamination that can be tolerated by paint systems.
This document provides information on the levels of water-soluble chloride and sulfate salt contamination that will
minimize the risk of coating failure. The information in this document is based on an evaluation of published data
from technical literature, as well as unpublished data from coating-system manufacturers and users.
TECHNICAL REPORT ISO/TR 15235:2001(E)

Preparation of steel substrates before application of paints and
related products — Collected information on the effect of levels of
water-soluble salt contamination
1 Scope
This Technical Report provides information on the effect of water-soluble chloride and sulfate contamination levels
on steel surfaces, before the application of paint or related products to surfaces prepared in accordance with
standard mechanical or blast-cleaning surface preparation methods.
NOTE The tolerance for water-soluble salt contamination may be different for different paint types.
This information may be used when evaluating the adequacy of surface preparation prior to painting.
This document is conce
...