SIST EN ISO 7784-2:2023

Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with abrasive rubber wheels and rotating test specimen (ISO 7784-2:2023)

This document specifies a method for determining the resistance to abrasion of coatings, for which two loaded, freely rotatable but eccentrically arranged abrasive rubber wheels affect the coating of the rotating test specimen.

Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil2: Verfahren mit Reibrädern aus Gummi und rotierender Probe (ISO 7784-2:2023)

Dieses Dokument legt ein Verfahren zum Bestimmen der Abriebbeständigkeit von Beschichtungen fest, bei dem zwei belastete, frei drehbare, aber exzentrisch angeordnete Reibräder aus Gummi auf die Beschichtung der rotierenden Probe einwirken.

Peintures et vernis - Détermination de la résistance à l'abrasion - Partie 2: Méthode utilisant des roues abrasives en caoutchouc et une éprouvette rotative (ISO 7784-2:2023)

Le présent document spécifie une méthode permettant de déterminer la résistance à l’abrasion des revêtements en appliquant deux roues abrasives en caoutchouc qui sont chargées et qui tournent librement, mais de manière excentrée sur le revêtement de l’éprouvette rotative.

Barve in laki - Ugotavljanje odpornosti proti obrabi - 2. del: Metoda z abrazivno gumo na vrteči plošči in rotirajočimi preskušanci (ISO 7784-2:2023)

Standard ISO 7784-2:2016 določa metodo za ugotavljanje odpornosti proti obrabi za premaze, pri čemer dve obremenjeni, prosto vrteči se in ekscentrično premikajoči se abrazivni gumeni plošči vplivata na premaz vrtečih se preskusnih vzorcev.

General Information

• Status: Published
• Public Enquiry End Date: 01-Jul-2022
• Publication Date: 29-Mar-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Mar-2023
• Due Date: 13-May-2023
• Completion Date: 30-Mar-2023
• Ref Project: EN ISO 7784-2:2023 - Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with abrasive rubber wheels and rotating test specimen (ISO 7784-2:2023)

Relations

• Replaces: SIST EN ISO 7784-2:2016 - Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with abrasive rubber wheels and rotating test panel (ISO 7784-2:2016)
• Effective Date: 01-May-2023

Overview

EN ISO 7784-2:2023 - "Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with abrasive rubber wheels and rotating test specimen" - specifies a standardized laboratory method to measure the abrasion resistance of coatings. The test uses two loaded, freely rotatable, eccentrically mounted abrasive rubber wheels pressed onto a rotating test specimen (turntable). Abrasive wear is assessed by measuring the loss of coating mass after a defined number of cycles. This is the 2023 (third) edition and supersedes EN ISO 7784-2:2016.

Key topics and technical requirements

• Test principle: Two abrasive rubber wheels on pivoting arms contact a rotating specimen to produce a ring-shaped wear zone; mass loss after the agreed cycles is measured.
• Apparatus: Turntable abrasion tester with pivoting arms and mandrels using ball bearings; wheels mounted on mandrels and, if required, loaded by weights.
• Critical dimensions & settings (as given in the standard):
  • Turntable speed: (60 ± 2) min⁻¹.
  • Wheel offset (eccentricity): (19.05 ± 0.3) mm.
  • Abrasive wheel axial bore: (16.0 ± 0.1) mm.
  • Wear zone width: about 13 mm.
  • Dust extraction: suction device positioned (3 ± 1) mm from the specimen.
• Specimen preparation & conditioning: Film thickness measurement and conditioning requirements reference ISO 2808 and ISO 3270; film thickness and substrate preparation are specified.
• Abrasive media: Rubber discs containing abrasive granulate; reference to FEPA Standard 43-1 for abrasive grain grades.
• Procedure & evaluation: Number of cycles is pre-set; test records mass loss (abrasive wear) and includes precision and reporting requirements.

Applications and users

This method is used where quantifiable, repeatable abrasion resistance data are required to:

• Support quality control in coating manufacturers and formulation development.
• Compare performance for industrial, automotive, marine, protective, and architectural coatings.
• Provide data for material specifications, procurement, and compliance testing. Primary users: materials testing laboratories, R&D teams, QC engineers, standards writers, and product certifiers seeking reliable coating durability testing.

Related standards

• ISO 7784 series: Part 1 (abrasive paper on rubber wheel - rotating) and Part 3 (abrasive paper on metal wheel - reciprocating).
• Normative references cited: ISO 1514, ISO 2808, ISO 3270, ISO 4618, ISO 48-4/48-5, and FEPA Standard 43-1.

This standard provides a reproducible abrasion test method - essential for consistent evaluation of coating durability and comparative performance data.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2023
Nadomešča:
SIST EN ISO 7784-2:2016
Barve in laki - Ugotavljanje odpornosti proti obrabi - 2. del: Metoda z abrazivno
gumo na vrteči plošči in rotirajočimi preskušanci (ISO 7784-2:2023)
Paints and varnishes - Determination of resistance to abrasion - Part 2: Method with
abrasive rubber wheels and rotating test specimen (ISO 7784-2:2023)
Beschichtungsstoffe - Bestimmung des Abriebwiderstandes - Teil2: Verfahren mit
Reibrädern aus Gummi und rotierender Probe (ISO 7784-2:2023)
Peintures et vernis - Détermination de la résistance à l'abrasion - Partie 2: Méthode
utilisant des roues abrasives en caoutchouc et une éprouvette rotative (ISO 7784-
2:2023)
Ta slovenski standard je istoveten z: EN ISO 7784-2:2023
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 7784-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 7784-2:2016
English Version
Paints and varnishes - Determination of resistance to
abrasion - Part 2: Method with abrasive rubber wheels and
rotating test specimen (ISO 7784-2:2023)
Peintures et vernis - Détermination de la résistance à Beschichtungsstoffe - Bestimmung des
l'abrasion - Partie 2: Méthode utilisant des roues Abriebwiderstandes - Teil2: Verfahren mit Reibrädern
abrasives en caoutchouc et une éprouvette rotative aus Gummi und rotierender Probe (ISO 7784-2:2023)
(ISO 7784-2:2023)
This European Standard was approved by CEN on 22 January 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7784-2:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7784-2:2023) 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 August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
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 7784-2:2016.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 7784-2:2023 has been approved by CEN as EN ISO 7784-2:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 7784-2
Third edition
2023-02
Paints and varnishes — Determination
of resistance to abrasion —
Part 2:
Method with abrasive rubber wheels
and rotating test specimen
Peintures et vernis — Détermination de la résistance à l'abrasion —
Partie 2: Méthode utilisant des roues abrasives en caoutchouc et une
éprouvette rotative
Reference number
ISO 7784-2:2023(E)
ISO 7784-2:2023(E)
© ISO 2023
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]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 7784-2:2023(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 .3
6 Test specimens . 5
6.1 Preparation of test specimens . 5
6.2 Film thickness . 5
6.3 Conditioning. 5
7 Procedure .5
7.1 Agreements . 5
7.2 Preparation of the abrasive wheels . 5
7.3 Test conditions . 6
7.4 Number of determinations . 6
7.5 Test procedure . 6
8 Ev a luat ion . 6
9 Precision . 6
10 Test report . 7
Bibliography . 8
iii
ISO 7784-2:2023(E)
Foreword
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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 third edition cancels and replaces the second edition (ISO 7784-2:2016), which has been technically
revised.
The main changes are as follows:
— Figures 1 and 2 have been updated;
—
...