采用动电位扫描、电化学阻抗、电子探针等方法，研究了1C r18Ni9Ti不锈钢在含H2S的酸性体系中表面钝化膜的破坏.结果表明：当H2S含量较低时 ，不锈钢表面钝化膜的厚度在H2S的作用下不断减薄，但并未完全破坏，电化学阻抗谱图 保留钝化膜的阻抗特征；当H2S含量较高时，不锈钢表面钝化膜被破坏，表面覆盖一层硫 化物膜，电化学阻抗谱图的特征发生变化.
The behavior of 1Cr18Ni9Ti stainless steel surface passive film have been studied by potentiodynamic、impendance and electron probe in 0.05 mol/L H2SO4 solution containing hydrogen sulfide.The results indica ted that the thickness of passive film attenuated with the increasing content of hydrogen sulfide,but the film did not destroy at a low concentration of hydroge n sulfide,the EIS characteristic of passive film remained.The passive film destr oyed at a high concentration of hydrogen sulfide (>200×10-6),and the surf ace film turned to sulfide film,then EIS characteristic changed as a result.
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