In order to meet the corrosion requirements of pressure vessels under high H2S, CO2and Cl-at home and abroad, the metal coating performance parameters are developed. A large number of experimental studies have been carried out to solve the technical issues on metal spraying such as low bonding strength (less than 80MPa) and high coating porosity (greater than 1%).The technology of the new metal coating materials and spraying molding process used in the medium and high pressure vessel is developed,which provides reference for corrosion protection of pressure vessel under high salinity and sulfur.