Effect of Chloride on Semiconducting Properties of Passive Films Formed on Supermartensitic Stainless Steel in NaHCO3 Solution

被引：26

作者：

Han Xiao-chen ^{[1
]}

Li Jun ^{[1
]}

Zhao Kun-yu ^{[1
]}

Zhang Wei ^{[2
]}

Su Jie ^{[3
]}

机构：

[1] Kunming Univ Sci & Technol, Coll Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] CISRI Qingdao Marine Corros Inst, Qingdao 266071, Shandong, Peoples R China

[3] Cent Iron & Steel Res Inst, Inst Struct Mat, Beijing 100081, Peoples R China

来源：

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2013年 / 20卷 / 05期

关键词：

supermartensitic stainless steel; passive film; capacitance measurement; semiconducting property; chloride ion; BORATE BUFFER; 304-STAINLESS-STEEL; POTENTIALS; BREAKDOWN; IRON; XPS; FE;

D O I：

10.1016/S1006-706X(13)60101-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of chloride ion on the electrochemical behavior and the semiconducting properties of the passive film on supermartensitic stainless steel in 0.5 mol/L NaHCO3 solution were investigated using potentiodynamic polarization, the potentiostatic current transients and Mott-Schottky analysis. The results indicated that chloride ion narrowed passivation region and improved pitting susceptibility. The steady state current densities were independent of film-formed potentials, which was in good agreement with the assumption of the point defect model (PDM). The capacitance results showed the fact that the passive films had a multilayer character. The defect density decreased with increasing passive film formation potential. The chloride ion induced changes of the acceptor densities and donor densities of the passive films.

引用

页码：74 / 79

页数：6

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