ISO INTERNATIONAL STANDARD 4624 Third edition 2016-03-01 Paints and varnishes Pull-off test for adhesion Peintures et vernis Essai de traction Reference number ISO 4624:2016(E) ISO International Organization for Standardization ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under No reproduction or networking permitted without license from IHS IS0 4624:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Principle 4 Apparatus. 5 Adhesives. ..4 6 Sampling. ..4 7 Test panels ..5 7.1 Substrate ..5 7.2 Preparation and coating. .5 7.3 Drying and conditioning .5 7.4 Thickness of coating. .5 8 Procedure .5 8.1 Number of determinations 5 8.2 Ambient conditions. 5 8.3 Adhesive.. .5 8.4 Test assemblies. 8.4.1 Method A: General method (using two dollies) for testing both rigid and deformablesubstrates .5 8.4.2 Method B: Method for testing from one side only, using a single dolly (suitable for rigid substrates only) 8.4.3 Method C: Method using dollies, one as a painted substrate. 7 8.5 Measurement .7 8.5.1 Breaking strength .7 8.5.2 Nature of the fracture .8 9 Calculation and expression of results .8 9.1 Breaking strength. ..8 9.2 Nature of failure .9 9.3 Example. .9 10 Precision ..9 11 Test report .9 Bibliography ..11 ii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under lic d without license from IHS