Test form and method of coating bond strength

       The bonding strength of the spray coating includes the bonding strength between the substrate and the coating and the bonding strength between the coating particles. It reflects the mechanical properties of the coating and is an important indicator of the coating quality.



Coating bonding strength provides a theoretical basis for the application of thermal spray coatings in various fields. It is one of the important mechanical properties of coatings. It is directly related to the reliability of repairing and strengthening parts, and is also an important basis for optimizing process parameters. one. The poor bonding strength of the coating will cause the coating to peel off, which will not only directly affect the appearance quality of the workpiece, but also make the protection and function of the coating ineffective. Therefore, if the bond strength of the coating is not acceptable, no other performance testing is required.

According to the type of coating and the use environment of the workpiece, the qualitative inspection of the coating can choose bending, filing, impact, scratching, heating and quenching, cupping and other methods.