【摘要】 采用AES和XPS表面分析技术,测定了OCr18Ni15Mo4奥氏体不锈钢在20％H₂SO₄和模拟湿法冶金铜电解液(20％H₂SO₄+35g/L Cu²⁺)中表面膜的合金元素分布、组态和结构。实验表明,表面钝化膜形成外层为氢氧化物和内层为氧化物的双层结构。在还原性稀硫酸中,钝化膜中形成以Mo（Ⅵ）和Cr³⁺为主的含N氧化物、氢氧化物,当溶液中增加Cu²⁺离子的去极化作用时,Mo元素的钝化作用受到抑制。更多还原

【Abstract】 By means of AES and XPS surface analyses, the alloying element distribution, composition and structure of surface passive film of stainless steel OCrl8Nil5Mo4 were investigated in 20%H2SO4 solution and 20%H2SO4+35g/L Cu2+, which simulated the solution in wet process of copper extraction. The results showed that the passive films possessed duplex structure consisting of an outer hydroxide and an inner oxide. The passive film in reductive dilute sulphuric acid was found to be enriched with Mo (VI), N and Cr3+. The passivation effect of Mo in passive film might be reduced with the depolarization effect ’ due to Cu2+ ions added.更多还原