Meaning and Purpose

4.1 Coatings with satisfactory performance need to adhere to the substrate to which they are applied. It has been found that the test method can be used to distinguish the degree of adhesion of the coating to the substrate. It is most applicable to provide a relative rating for a range of coated plates that exhibit significant differences in adhesion.

4.2 Studies conducted in the laboratory using the ring pen specified in the previous edition have shown that meaningful adhesion data are not possible when a load of 10 to 20 kg is required to break the surface of the solvent-based coating. When a load of this magnitude is required, the chrome-plated ring stylus vibrates and jumps on the coated surface. Similar meaningless data were obtained when testing required more than 10kg of powder paint to destroy the surface. Therefore, testing under these conditions is not applicable.

ASTM D2197-16-2022 Evaluation of Adhesion of Organic Coatings by Scratch Method

Scope of

1.1 This test method covers the determination of adhesion of organic coatings such as paint, varnish and lacquer on smooth, flat (flat) panel surfaces.

1.2 Values expressed in SI units are treated as standards. The values given in parentheses are for reference only.

1.3 This standard is not intended to address all safety issues, if any, associated with its use. It is the responsibility of users of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

1.4 This international Standard has been developed in accordance with the internationally accepted standardization principles established in the decisions of the Committee on Technical Barriers to Trade (TBT) of the World Trade Organization on the Formulation of International standards, guidelines and recommended principles.