18—8不锈钢钝化膜的光电化学研究  

Photoelectrochemical Investigation of Passive Film on 18-8 Stainless Steel

作　　者：张国栋[1] 姚文锐[1] 郭万华[1] 

机构地区：[1]华东冶金学院化学工程系

出　　处：《华东冶金学院学报》1990年第4期51-56,共6页

摘　　要：本文研究了18—8不锈钢钝化膜在硼酸/硼酸钠溶液中的光电化学特性,并和相同条件F纯铁、铬、镍以及铁铬合金钝化膜的光电化学行为进行了比较。结果指出,不锈钢钝化膜主要由Cr_2O_3和Fe_2O_3的固溶体组成,并具有非晶态n型半导体特性。其平带电位为-0.30V(SCE),禁带宽度为2.1eV。The Pkotoeleetrochemical behavior of the passive film on 18-8 austenitic stainless steel in pH=8.4 borate solution has been studied. The photoelectroche,nical behavior of passive film formed on 18-8 stainless steel is compared to that formed on Fe, Ni, Cr and Fe-Cr alloy. Results indicate that the passive film on 18-8 stainless is composed of the solid solution of Fe_2O_ and Cr_2O_3. The film shows noncrystalline n-type conductor behavier. Its fiat band potential lies at -0.30V (SCE) and bandgap value is 1.geV.

关 键 词：不锈钢钝化膜 光电化学 固溶体 

分 类 号：TQ153.6[化学工程—电化学工业]