Effects of nitrogen on the passivity of Fe-20Cr alloy

被引：68

作者：

Ha, HeonYoung ^{[2
]}

Jang, HeeJin ^{[3
]}

Kwon, HyukSang ^{[1
]}

Kim, Sungjoon ^{[2
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

[2] KIMS, Ferrous Alloys Res Grp, Chang Won 641831, South Korea

[3] Chosun Univ, Dept Met Engn, Kwangju 501759, South Korea

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 01期

关键词：

Stainless steel; XPS; Passive films; PHOTOELECTROCHEMICAL ANALYSIS; PITTING CORROSION; STAINLESS-STEEL; PASSIVATION;

D O I：

10.1016/j.corsci.2008.10.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Influences of nitrogen on the passivity of Fe-20Cr-(0, 1.1)N alloys were examined by in situ electrochemical techniques. Nitrogen was incorporated in the form of (Fe, Cr)-nitrides in the passive film, and Cr was enriched in the film of the alloy with nitrogen. Photocurrent analysis demonstrated that the structure of passive film formed on Fe-20Cr-1.1N alloy is Cr-substituted gamma-Fe2O3 with (Fe, Cr)-nitrides. Mott-Schottky analysis revealed that the film formed on Fe-20Cr-1.1N contained higher Cr6+ and lower Cr3+ vacancy concentrations compared with that on Fe-20Cr alloy. All of these results were associated with the enhanced protectiveness of the film on Fe-20Cr-1.1N. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：48 / 53

页数：6

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