图3 4种不同处理的430不锈钢在3.5%NaCl溶液中的阻抗模量图 A 和相位角图 B Fig.3 Impedance modulus A and phase diagrams B of four different treated 430 stainless steels in 3.5% mass fraction of NaCl solution a .untreated; b .dipping-coated DTES; c .electrodeposited DTES; d .electrodeposited DTESGO