Silane agent is applied directly for metallic surface corrosion resisting, which can replace phorsphating technique.SA film is prepared under the optimal processing conditions, and reflective FTIR spectroscopy is used to analyse component and structure of SA film. Film thickness is detected by elliptical spectroscopy method, and results of electrochemical corrosion processing detecting and CuSO 4 solution point corrosion experiment are used to verify corrosion resistance of SA film.