Study on Thermal Diffusion of Zinc-Aluminum Coating on AZ91D Magnesium Alloy
A protecting layer of zinc-aluminum coating on the surface of AZ91D magnesium alloy was obtained by thermal spraying. In order to enhance the integrating strength between magnesium alloy matrix and zinc-aluminum coating, The heat diffasion treatment was used to forme the metalturgy combination,the effects of temperature and time on the microstructure and property of the coating were exptored. The results show that a diffusion fusion layer is formed between the substrate and the coating, and the integrating strength is greatly improved,the optimization heat diffusion process is at 300℃ for two hours.