Antioxidant and flame retardant coating for titanium alloys

At room temperature, a dense oxide film can be formed on the surface of titanium alloy, so it has good room temperature corrosion resistance. Titanium alloy parts used in some aerospace vehicles need to be used at medium or even high temperatures, and the oxide film formed under this condition is porous TiO2, which cannot effectively resist the inward diffusion of oxygen atoms. On the other hand, the ignition point of titanium alloys is lower than the melting point. When the titanium alloy parts of the aero-engine moving at high speed are displaced due to some reasons (such as deformation, fracture, etc.), the relative movement between the parts (such as rotating the stator) high-speed friction, and heat may ignite the Gr5 Ti-6Al-4V Titanium Sheet and cause a titanium fire accident, which seriously endangers the aviation industry. Safe use of spacecraft. Therefore, the development of titanium alloy anti-oxidation coatings and flame retardant coatings has been actively carried out at home and abroad. It is a reliable method to change the oxidation and temperature rise mechanism of titanium alloy surfaces with two types of coatings.