![]() The weakest path could be along an interface between two coatings, a cohesive fracture within one coating, a cohesive fracture of the substrate (e.g. The sample will be subjected to increasing tensile stresses until the weakest path trough the material fractures. The purpose of this test is to measure the mechanical tensile strength of a coating. Pull-off adhesion testing of paint, varnish and other coatings and films with the PAT adhesion tester and the DFD® method.ĪSTM D4541 and ISO 4624 (EN 24624) “ISO 4624 paints and varnish pull off test for adhesion” both define the method and procedures for carrying out pull-off adhesion testing of paints, varnishes and other coatings. ![]() ![]() Go here for the ASTM standard for adhesion testing of thermal sprayed coatings ASTM C633 Pull-off adhesion testing of paint, varnish and other coatings and films with the PAT adhesion tester and the DFD® method The Test Method ![]()
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