The inner wall of equipments in Moxi gas field gas processing plant is featured by high operating temperature, strong and severe corrosive medium such as H₂S,CI-,CO₂ and so on. According to test for the metal ceramic coating and investigation for its application to other projects, it was proved that the metal ceramic coating has superior performance as strong adhesion, abrasion resistance, high temperature resistance, resistance to hydrogen sulfide, carbon dioxide and chloride ions. The application of ceramic metal coating to the inner wall of equipment guarantees safety operation of equipments and it was found through actual operation and verification for 1 year that the ceramic metal coating had strong corrosion resistance in high temperature and other conditions with corrosive medium as H₂S,CI-,CO_2.