Basic principles of thermal spray material selection

       The selection of the correct thermal spray coating material is a continuous and complex process, which should start from the initial design stage of the coating until the end of the reference of the coating performance. Coating designers must have basic knowledge of material science of various coating materials and a deep understanding of working conditions, and should also have a full understanding of the characteristics of various thermal spraying processes and the influence of the spraying process, in order to achieve the best possible results. Optimum coating material selection and design.



The requirements for coating materials are various, especially the functional selection principle of coating materials. The principles that should be followed in the selection of thermal spray coating materials are summarized as follows:



1) According to the working conditions or the designed coating performance index parameters, the function of the coating material is selected, and the functional requirements must first be met.



2) Meet the needs of thermal spraying process, such as wire diameter, surface quality, powder particle size, fluidity, bulk density, etc.



3) It has a good performance matching relationship with the matrix material.



4) The production method of the coating material and the price of the material.



5) Evaluation of the toxicity of the coating material and its impact on the environment.



Considering the influence of the above factors, the appropriate coating material can be selected reasonably and effectively.