By adding the modified enamel,anti-corrosion coating was formed on the surface of Q235 steel by plasma spraying technology.The microstructure was analyzed and charac-terized by means of SEM.The corrosion resistance of the coating was studied by static cor-rosion test and electrochemical corrosion test.The results show that all coatings are not cor-roded in alkaline solution;the degree of corrosion in acid solution in all coatings compared to the substrate plate is small,and modifier for NiO coating corrosion resistance to acid is slightly better than that of the modifier for the TiO 2 coating....