The coating has strong bonding force with the substrate. The coating has high hardness, friction resistance and impact resistance. Applications of high-temperature anti-corrosion coatings: With the rapid development of aviation, aerospace, automobiles, weapons and other industries, the performance requirements for metal materials are getting higher and higher. Not only do they need to operate at higher operating temperatures and more harsh corrosive environments, At the same time, it must also have properties such as resistance to vibration, fatigue, sudden temperature changes, and erosion resistance. Organic polymer materials have been difficult to meet the requirements. Phosphate-based high-temperature-resistant coatings are inorganic coatings that can undergo ceramic transformation at high temperatures and have excellent high-temperature resistance and anti-corrosion properties. This paper uses water-soluble phosphate as the main film-forming substance, chromic anhydride as the regulator, and adds different types of reactive and functional pigments and fillers as well as metal powders with different melting points to prepare inorganic high-temperature anti-corrosion coatings. The coating can react with itself to form a dense protective layer at a certain temperature. It can also react with metal materials in a short time to form a metal complex layer. It has excellent adhesion and can be used at temperatures above 850°C for a long time. , and has excellent resistance to moisture and heat, salt spray and high and low temperatures. It has been widely used in aerospace, petroleum and petrochemical, metallurgy, electric power, and military systems. It is suitable for anti-corrosion of chimney flues, high-temperature steam pipes, heat exchangers, high-temperature furnaces, high-temperature desulfurization equipment, petroleum and petrochemical cracking equipment, engine parts, and exhaust pipes. . With the development of the aviation and aerospace industries, the use of high-temperature resistant anti-corrosion coatings will gradually expand.