Paints and varnishes - Determination of the resistance of coatings to pressure water-jetting (ISO 16925:2021)

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.

Beschichtungsstoffe - Prüfung der Beständigkeit von Beschichtungen gegen Druckwasserstrahl (ISO 16925:2021)

Dieses Dokument legt ein Prüfverfahren zum Beurteilen der Beständigkeit von Beschichtungen gegen die Einwirkung eines Druckwasserstrahls fest. Das Prüfverfahren simuliert die Auswirkungen eines Druck¬wasserstrahls auf eine Beschichtung.

Peintures et vernis - Détermination de la résistance des revêtements à un jet d'eau sous pression (ISO 16925:2021)

Le présent document spécifie une méthode d’essai pour l’évaluation de la résistance des revêtements à un jet d’eau sous pression. La méthode d’essai simule les effets d’un jet d’eau sous pression sur un produit de peinture.

Barve in laki - Ugotavljanje odpornosti premazov proti curkom vode pod tlakom (ISO 16925:2021)

Ta dokument določa preskusno metodo za vrednotenje odpornosti premazov proti curkom vode pod tlakom. Preskusna metoda simulira učinke curka vode pod tlakom na premaz.

General Information

Status
Published
Public Enquiry End Date
03-Aug-2021
Publication Date
23-Aug-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Aug-2022
Due Date
06-Oct-2022
Completion Date
24-Aug-2022

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SLOVENSKI STANDARD
SIST EN ISO 16925:2022
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
SIST EN ISO 16925:2022 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 16925:2022
---------------------- Page: 2 ----------------------
SIST EN ISO 16925:2022
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.
---------------------- Page: 3 ----------------------
SIST EN ISO 16925:2022
EN ISO 16925:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 16925:2022
EN ISO 16925:2022 (E)
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.

---------------------- Page: 5 ----------------------
SIST EN ISO 16925:2022
---------------------- Page: 6 ----------------------
SIST EN ISO 16925:2022
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 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 16925:2022
ISO 16925:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© 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
© ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 16925:2022
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 2021 – All rights reserved
---------------------- Page: 9 ----------------------
SIST EN ISO 16925:2022
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.
© ISO 2021 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 16925:2022
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
...

SLOVENSKI STANDARD
oSIST prEN ISO 16925:2021
01-julij-2021
Barve in laki - Ugotavljanje odpornosti premazov proti curkom vode pod tlakom
(ISO/DIS 16925:2021)

Paints and varnishes - Determination of the resistance of coatings to pressure water-

jetting (ISO/DIS 16925:2021)
Beschichtungsstoffe - Prüfung der Beständigkeit von Beschichtungen gegen
Druckwasserstrahl (ISO/DIS 16925:2021)

Peintures et vernis - Détermination de la résistance des revêtements à un jet d'eau sous

pression (ISO/DIS 16925:2021)
Ta slovenski standard je istoveten z: prEN ISO 16925
ICS:
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 16925:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN ISO 16925:2021
---------------------- Page: 2 ----------------------
oSIST prEN ISO 16925:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16925
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2021-06-18 2021-09-10
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

ICS: 87.040
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 16925:2021(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 2021
---------------------- Page: 3 ----------------------
oSIST prEN ISO 16925:2021
ISO/DIS 16925:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© 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 2021 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 16925:2021
ISO/DIS 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.............................................................................................................................................................................. 1

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 E valuation with pictures to compare ................................................................................................................................... 6

10 Precision ....................................................................................................................................................................................................................... 6

10.1 General ........................................................................................................................................................................................................... 6

10.2 Repeatability limit (r) ....................................................................................................................................................................... 7

10.3 Reproducibility limit (R) ................................................................................................................................................................ 7

11 Designation ................................................................................................................................................................................................................ 7

12 Test report ................................................................................................................................................................................................................... 7

Annex A (informative) Calibration of the test apparatus .............................................................................................................14

© ISO 2021 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 16925:2021
ISO/DIS 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.

This second edition cancels and replaces the first edition (ISO 16925:2014), which has been technically

revised.
The main changes compared to the previous edition 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 A2.4 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 © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 16925:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 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 assessment 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 4818 apply.

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
— 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 impact area, the angle of impact, and the water temperature of the jet, as well as the cutting and

scribing tool.

The evaluation is carried out by means of a visual comparison of pictures, in which characteristic values

are related to the peeled-off areas.

The parting line (plane) of the peeling shall be indicated in the test report (e.g. substrate/priming coat).

5 Apparatus and materials
Ordinary laboratory apparatus, together with the following:
© ISO 2021 – All rights reserved 1
---------------------- Page: 7 ----------------------
oSIST prEN ISO 16925:2021
ISO/DIS 16925:2021(E)
5.1 Pressure water-jet, consisting of a high-pressure pump and a nozzle.

A high-pressure pump conveys the water from a storage bin. To avoid influences from variations in

pressure, it is necessary that the pressure and the mass flow rate be adjustable at the nozzle described

below.
The water temperature shall be adjustable to ± 2 °C.

The temperature shall be adjusted in accordance with Annex A. Necessary safety devices on the

pressure side of the unit, as e.g. pressure relief valve and by-pass valve, shall exist. If the jetting is

unsteady, a flow calming section may be installed in front of the nozzle. A pulsation of the water jet

at the opening of the pump is inadmissible. In order to reach a reproducible result, the nozzle shall be

solidly mechanically fixed and the test specimen shall be secured against slipping. For the adjustment

of the mass flow rate, a nozzle with a jet angle of 40° and a mass flow rate of 6 kg/min at 2 MPa (20 bar)

is required (see Annex A).
The following technical data should be attainable:
— mass flow rate: 8 kg/min to 14 kg/min
— press
...

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