EN ISO 16925:2022

SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN ISO 16925:2014
Barve in laki - Ugotavljanje odpornosti premazov proti curkom vode pod tlakom
(ISO 16925:2021)
Paints and varnishes - Determination of the resistance of coatings to pressure water-
jetting (ISO 16925:2021)
Beschichtungsstoffe - Prüfung der Beständigkeit von Beschichtungen gegen
Druckwasserstrahl (ISO 16925:2021)
Peintures et vernis - Détermination de la résistance des revêtements à un jet d'eau sous
pression (ISO 16925:2021)
Ta slovenski standard je istoveten z: EN ISO 16925:2022
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16925
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 16925:2014
English Version
Paints and varnishes - Determination of the resistance of
coatings to pressure water-jetting (ISO 16925:2021)
Peintures et vernis - Détermination de la résistance des Beschichtungsstoffe - Prüfung der Beständigkeit von
revêtements à un jet d'eau sous pression (ISO Beschichtungen gegen Druckwasserstrahl (ISO
16925:2021) 16925:2021)
This European Standard was approved by CEN on 28 February 2022.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16925:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 16925:2022) 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 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
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 16925:2014.
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.
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 16925:2021 has been approved by CEN as EN ISO 16925:2022 without any modification.

INTERNATIONAL ISO
STANDARD 16925
Second edition
2021-12
Paints and varnishes — Determination
of the resistance of coatings to
pressure water-jetting
Peintures et vernis — Détermination de la résistance des revêtements
à un jet d'eau sous pression
Reference number
ISO 16925:2021(E)
ISO 16925:2021(E)
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 16925:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus and materials .2
6 Sampling . 3
7 Preparation of test specimens . 4
7.1 Test specimens. 4
7.2 Preparation and coating . 4
7.3 Thickness of coating . 4
8 Procedure .4
8.1 Introducing the cut or the scribe . . . 4
8.2 Testing . 5
9 Evaluation . 6
9.1 General . 6
9.2 Evaluation with illustrations to compare . 6
10 Precision .13
10.1 General .13
10.2 Repeatability limit (r) . 13
10.3 Reproducibility limit (R) . 13
11 Designation .13
12 Test report .14
Annex A (normative) Calibration of the test apparatus .15
iii
ISO 16925:2021(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, 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 second edition cancels and replaces the first edition (ISO 16925:2014), which has been technically
revised.
The main changes are as follows:
— the definitions “fracture strength”, “adhesion” and “cohesion” have been deleted from Clause 3
because they are not used in this document;
— in 5.1 and in A.2.4 the data for the adjustment of the mass flow rate have been updated;
— in 8.2 and in the test report the agreement of the mass flow rate has been deleted because it is given
by the test method and need not to be agreed;
— the volumetric flow rate has been changed to mass flow rate in several places;
— the normative references have been updated and the text has been editorially revised.
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
INTERNATIONAL STANDARD ISO 16925:2021(E)
Paints and varnishes — Determination of the resistance of
coatings to pressure water-jetting
1 Scope
This document specifies a test method for the evaluation of the resistance of coatings to pressure
water-jetting. The test method simulates the effects pressure water-jetting has on a coating.
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 2808, Paints and varnishes — Determination of film thickness
ISO 4618, Paints and varnishes — Terms and definitions
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 17872, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on
metallic panels for corrosion testing
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 resistance of a coated test specimen to the loss of adhesive strength is tested by means of defined
pressure water-jetting.
The extent of the damage of the test specimen primarily depends on, besides the adhesive strength,
the space between nozzle and test piece, the mass flow rate, the test time, the geometry of the nozzle,
the im
...