ISO/TR TECHNICAL REPORT 19402 First edition 2018-08 Paints and varnishes Adhesion of coatings Peintures et vernis -Adhérence des revetements Reference number IS0/TR 19402:2018(E) @IS02018 ut license from IHS Not for Resale, 08/06/2018 08:24:43 MDT IS0/TR 19402:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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: +4122 749 0111 Fax:+41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Publishied in Switzerland @ IS0 2018 - All rights reserved or netwprking permited without license from HS Not for Resale, 08/06/2018 08:24:43 MDT IS0/TR 19402:2018(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope 2 Normative references 3 Terms and definitions 4 Adhesive strength tests without scratch/cut .3 4.1 Tests with mechanical stress application on the coating .3 .3 4.1.1 Pull-offtest. 4.1.2 Twist-off test ..5 4.1.3 Peel-off test 1 4.1.4 Peel-off test2 .8 4.2 Tests with continuous deformation of test specimens ..9 4.2.1 Bend test with a wedge-shaped conical mandrel .9 4.2.2 Bend test with a conical mandrel ..11 4.2.3 Bend test with a cylindrical mandrel 1 .12 4.2.4 Bend test with a cylindrical mandrel 2 .14 4.2.5 Three point bending method .15 4.2.6 T-bend test 1 .17 4.2.7 T-bend test 2. .19 4.2.8 Cupping test 1. .20 4.3 Test with impact stress application 22 4.3.1 Single-impact test 1 .22 4.3.2 Single-impact test 2 .25 4.3.3 Single-impact test 3 27 4.3.4 Single-impact test 4 28 4.3.5 Falling-weight test 1 30 4.3.6 Falling-weight test 2 33 4.3.7 Falling-weight test 3 .35 4.3.8 Multi-impact test 1. 36 4.3.9 Multi-impact test 2. ..38 4.3.10 Multi-impact test 3. .41 4.3.11 Multi-impact test 4. ..43 4.3.12 Impact-bend test. ..44 5 Adhesive strength tests with scratch/cut .45 5.1 Tests with single scratch ..45 5.1.1 Scratch test 1 ..45 5.1.2 Scratch test 2 .46 5.1.3 Scratch test 3 (Scrape-adhesion test) ..47 5.2 Test with multiple scratch (without deformation of test specimens) .49 5.2.1 Pressure-water jetting test. .49 5.2.2 Cross-cut test 1 .53 5.2.3 Cross-cut test 2. 56 5.2.4 Cross-cut test 3 57 5.2.5 X-cut test 1 58 5.2.6 X-cut test 2 .58 5.2.7 X-cuttest3. .59 5.2.8 X-cut test 4 59 5.2.9 Scribe test with a square-diagonal grid .60 5.2.10 Scribe test with a rhombus grid .61 5.3 Test with multiple scratch (with deformation of test specimens) .62 5.3.1 Cupping test 2. ..62 6 Evaluation methods for adhesive strength ..63 iii nitted without license from IHS Not for Resale, 08/06/2018 08:24:43 MDT