抄録
Since adhesion is one of the most important properties for coatings to ensure its reliability, it is often necessary to quantitatively or semi-quantitatively evaluate the adhesion strength of coatings. Several testing methods to evaluate coating adhesion have been proposed and used. When applying the adhesion test, it becomes important to understand the characteristics of the test method and the physical meaning of the evaluated parameters. It is well known that the joint of the dissimilar elastic materials has the singular stress field at the edge of the interface; thus, we should consider the delamination mechanisms of coatings based on the interfacial mechanics even if no crack occurs at the interface. The linear interfacial fracture mechanics is also applicable in the actual coatings when satisfying with the small-scale yielding condition, although they are elastic-plastic materials. This review summarized the typical testing methods to evaluate the adhesion of coatings. In addition, it is tried to discuss typical parameters for the coating adhesion with physical meaning based on the interfacial mechanics.
