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

被引：66
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.
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收藏
页码：48 / 53
页数：6
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