Effect of Ni on pit depth of 21Cr ferritic stainless steel under the atmospheric environment

被引：0

作者：

Shibatsuji Y. ^{[1
]}

Nishimura M. ^{[2
,3
]}

Ishii T. ^{[4
]}

Aoki S. ^{[5
]}

Sakai J. ^{[5
,6
]}

机构：

[1] School of Fundamental Science and Engineering, Waseda University, 3-4-1, Ohkubo, Shinjyuku-ku, 169-8555, Tokyo

[2] Department of Fundamental Science and Engineering, Waseda University, 3-1-1, Toyosu, Koto-ku, 135-8710, Tokyo

[3] JFE Steel Corporation, 1, Kawasaki-cho, Chuo-ku, 260-0835, Chiba

[4] Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26, Nishiwaseda, Shinjuku-ku, 169-0054, Tokyo

[5] Faculty of Science and Engineering, Waseda University, 3-4-1, Ohkubo, Shinjyuku-ku, 169-8555, Tokyo

来源：

| 1600年 / Japan Society of Corrosion Engineering卷 / 65期

关键词：

Active dissolution; Atmospheric corrosion; Ferritic stainless steel; Gumbel distribution; Ni; Pit depth; Repassivation;

D O I：

10.3323/jcorr.65.259

中图分类号：

学科分类号：

摘要：

The objective of this study was to clarify effect of Ni on pit depth of 21Cr ferritic stainless steel under the atmospheric environment. The atmospheric exposure test was conducted for 1, 3, 6, 12 and 18 months. After the atmospheric exposure, the depth of each pit was measured by a laser microscope. As a result, the estimated maximum pit depth became shallower by 1.5 mass% Ni addition. The pitting potential measurement test, the anodic polarization measurement test and the corrosion potential measurement test were also conducted. Ni did not have effect on the pitting potential. Ni not only reduced active dissolution but also facilitated repassivation. These electrochemical factors made pit depth shallower. © 2016, Japan Society of Corrosion Engineering. All rights reserved.

引用

页码：259 / 263

页数：4

共 7 条

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