ISO INTERNATIONAL STANDARD 20567-1 Second edition 2017-01 Paints and varnishes Determination of stone-chip resistance of coatings - Part 1: Multi-impact testing Peintures et vernis Détermination de la résistance des revetements aux impacts de cailloux - Partie 1: Essais de chocs multiples Reference number ISO 20567-1:2017(E) ISO International Organization for Standardization @ IS0 2017 ee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 mitted without license from IHS IS0 20567-1:2017(E) COPYRIGHT PROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZAISQ 3017 - All rights reserVed Not for Resale, 2017/3/28 02:53:36 networking permited without license from IHS IS0 20567-1:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle ..1 5 Apparatus .2 6 Materials. 7 Test panels .4 7.1 Substrate ..4 7.2 Preparation and coating. .4 7.3 Thickness of coating ..4 8 Procedure.. ..4 8.1 Conditioning of the test panels .4 8.2 Test conditions .4 8.3 Projection of grit .4 9 Evaluation ..5 10 Precision .5 10.1 Repeatability limit, r. ..5 10.2 Reproducibility limit, R ..5 11 Test report .6 Annex A (informative) Examples of suitable procedures for removing loose paint .10 Annex B (informative) Recommended procedure for calibration of test apparatus (examination of the damaged area) .11 iii icenSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vithout license from IHS