SIST EN ISO 20567-2:2023

Paints and varnishes - Determination of stone-chip resistance of coatings - Part 2: Single-impact test with a guided impact body (ISO 20567-2:2023)

This document specifies a method to evaluate the resistance of automobile finishes and other coatings to the impact of a wedge-shaped body which is projected onto the surface under test to simulate the impact of stones.

Beschichtungsstoffe - Prüfung der Steinschlagfestigkeit von Beschichtungen - Teil 2: Einzelschlagprüfung mit geführtem Schlagkörper (ISO 20567-2:2023)

Dieses Dokument legt ein Verfahren zum Beurteilen der Beständigkeit von Kraftfahrzeugbeschichtungen und anderen Beschichtungen gegen den Einschlag eines keilförmigen Schlagkörpers als simulierte Stein-schlageinwirkung fest.

Peintures et vernis - Détermination de la résistance des revêtements aux impacts de cailloux - Partie 2: Essai de choc simple par corps percutant guidé (ISO 20567-2:2023)

Le présent document spécifie une méthode pour évaluer la résistance des revêtements, notamment ceux utilisés pour la finition des carrosseries de voitures, à la projection d'un corps en forme de coin contre la surface soumise à essai, cette projection étant destinée à simuler l'impact de cailloux.

Barve in laki - Ugotavljanje odpornosti premazov proti udarcem kamenja - 2. del: Preskus z enim udarcem vodenega telesa (ISO 20567-2:2023)

Standard ISO 20567-2:2017 določa metodo za vrednotenje odpornosti avtomobilskih premazov in drugih prevlek proti udarcem s klinastim predmetom, ki simulirajo udarce kamenja.

General Information

• Status: Published
• Public Enquiry End Date: 02-Feb-2023
• Publication Date: 20-Aug-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 17-Jul-2023
• Due Date: 21-Sep-2023
• Completion Date: 21-Aug-2023
• Ref Project: EN ISO 20567-2:2023 - Paints and varnishes - Determination of stone-chip resistance of coatings - Part 2: Single-impact test with a guided impact body (ISO 20567-2:2023)

Relations

• Replaces: SIST EN ISO 20567-2:2017 - Paints and varnishes - Determination of stone-chip resistance of coatings - Part 2: Single-impact test with a guided impact body (ISO 20567-2:2017)
• Effective Date: 01-Sep-2023

Overview

EN ISO 20567-2:2023 - “Paints and varnishes - Determination of stone‑chip resistance of coatings - Part 2: Single‑impact test with a guided impact body” - is an international/CEN‑endorsed method for evaluating the resistance of automotive finishes and other coatings to stone‑impact damage. Published in 2023 (third edition), this standard defines a reproducible single‑impact test that simulates stone‑chip damage using a wedge‑shaped guided impact body driven by a compressed‑air propelled steel ball.

Key topics and technical requirements

• Scope and purpose: Assessment of stone‑chip resistance of coatings by producing a delamination pattern equivalent to multi‑impact tests.
• Test principle: A wedge‑shaped impact body is pushed into the coating by energy transferred from a compressed‑air accelerated steel ball; loose fragments are removed and the total width of delamination (including the wedge mark) is measured.
• Apparatus: Single‑impact tester with a guided wedge impact body (impact body material: hardened steel, 60–66 HRC). A steel ball (mass less than the impact body) is accelerated by compressed air (nominal 300 kPa / 3 bar).
• Impact body life: The impact body shall be checked and replaced if necessary after a maximum of 500 test runs or at the end of a test series that reaches 500 impacts at the same contact point.
• Test panels: Minimum panel size 100 mm × 100 mm, substrate thickness at least 0.7 mm. Panels must be prepared per ISO 1514 and coated using the manufacturer’s application method.
• Coating thickness: Measured in micrometres by methods in ISO 2808.
• Procedure elements: Calibration, conditioning (refer to ISO 3270 for temperature/humidity), test conditions, number of runs, removal of loose paint, and result evaluation.
• Evaluation & precision: Results are reported as total delamination width; the standard addresses precision (repeatability and reproducibility) and requires calibrated equipment (see normative Annex B).

Applications and users

• Primary users: Automotive manufacturers, OEM paint labs, coating formulators, independent testing laboratories, and quality assurance teams.
• Use cases:
  • Comparative performance testing of paints, clearcoats and multi‑layer automotive systems.
  • Validation of new formulations or process changes (application, curing).
  • Supplier qualification and acceptance testing for stone‑chip resistance claims.
  • R&D screening to correlate lab impact behavior with field performance.
• Practical value: Provides a standardized, repeatable method to quantify susceptibility to stone chipping, enabling objective comparisons and quality control.

Related standards

• ISO 20567 series (multi‑ and other single‑impact tests): ISO 20567‑1 (multi‑impact), ISO 20567‑3 (other single‑impact variant).
• Test panel and conditioning references: ISO 1514, ISO 2808, ISO 3270.
• Material reference for substrates: EN 573‑3 (aluminium alloys).

Keywords: stone‑chip resistance, paint testing, single‑impact test, ISO 20567‑2:2023, coatings, automotive finishes, impact tester, wedge impact body.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2023
Nadomešča:
SIST EN ISO 20567-2:2017
Barve in laki - Ugotavljanje odpornosti premazov proti udarcem kamenja - 2. del:
Preskus z enim udarcem vodenega telesa (ISO 20567-2:2023)
Paints and varnishes - Determination of stone-chip resistance of coatings - Part 2:
Single-impact test with a guided impact body (ISO 20567-2:2023)
Beschichtungsstoffe - Prüfung der Steinschlagfestigkeit von Beschichtungen - Teil 2:
Einzelschlagprüfung mit geführtem Schlagkörper (ISO 20567-2:2023)
Peintures et vernis - Détermination de la résistance des revêtements aux impacts de
cailloux - Partie 2: Essai de choc simple par corps percutant guidé (ISO 20567-2:2023)
Ta slovenski standard je istoveten z: EN ISO 20567-2:2023
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 20567-2
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 20567-2:2017
English Version
Paints and varnishes - Determination of stone-chip
resistance of coatings - Part 2: Single-impact test with a
guided impact body (ISO 20567-2:2023)
Peintures et vernis - Détermination de la résistance des Beschichtungsstoffe - Prüfung der Steinschlagfestigkeit
revêtements aux impacts de cailloux - Partie 2: Essai de von Beschichtungen - Teil 2: Einzelschlagprüfung mit
choc simple par corps percutant guidé (ISO 20567- geführtem Schlagkörper (ISO 20567-2:2023)
2:2023)
This European Standard was approved by CEN on 5 May 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 20567-2:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20567-2:2023) 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 January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
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 20567-2:2017.
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 20567-2:2023 has been approved by CEN as EN ISO 20567-2:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 20567-2
Third edition
2023-06
Paints and varnishes — Determination
of stone-chip resistance of coatings —
Part 2:
Single-impact test with a guided
impact body
Peintures et vernis — Détermination de la résistance des revêtements
aux impacts de cailloux —
Partie 2: Essai de choc simple par corps percutant guidé
Reference number
ISO 20567-2:2023(E)
ISO 20567-2:2023(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 20567-2:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus and materials .2
5.1 Single-impact tester . 2
6 Test panels .2
6.1 Substrate . 2
6.2 Preparation and coating . 2
6.3 Thickness of the coating . 2
7 Procedure .4
7.1 Calibration . 4
7.2 Conditioning of the test panels . 4
7.3 Test conditions . 4
7.4 Number of test runs . 4
7.5 Determination . 5
8 Ev a luat ion . 5
9 Precision . 6
9.1 Repeatability limit, r . . 6
9.2 Reproducibility limit, R . 6
10 Test report . 7
Annex A (informative) Examples of suitable procedures for removing loose paint .8
Annex B (normative) Calibration of the test apparatus . 9
iii
ISO 20567-2:2023(E)
Foreword
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