The ISO 27307 standard specifies a method for evaluating the adhesion and cohesion of thermal spray ceramic coatings by means of a transverse scratch test. This method detects damage and failure modes of coatings under increasing stress by applying transverse mechanical forces to analyze the interfacial properties of the coating and the bonding mass within the coating. This standard is suitable for quality control, material development and thermal spray process optimization to help evaluate the performance Stability and application Reliability of coatings. ISO 27307 provides a uniform specification for adhesion testing of thermal spray ceramic coatings and is an important technical reference for the thermal spray industry.