Dissolution Behavior of α and γ Phases of a Duplex Stainless Steel in a Simulated Crevice Solution

被引：21
|
作者：
Aoki, S. [1 ]
Yakuwa, H. [2 ]
Mitsuhashi, K. [2 ]
Sakai, J. [3 ]
机构：
[1] Waseda Univ, Dept Appl Mech, Shinjuku Ku, Tokyo 1698555, Japan
[2] Ebara Corp, Fluid Machinery & Syst Co, Fujisawa, Kanagawa 2518502, Japan
[3] Waseda Univ, Fac Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan
来源：
CORROSION (GENERAL) - 216TH ECS MEETING | 2010年 / 25卷 / 37期
关键词：
D O I：
10.1149/1.3407544
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The purpose of this study is to clarify corrosion mechanism of a duplex stainless steel (DSS) through dissolution behavior of a ferritic phase and austenitic phase, respectively. A single phase specimen ([alpha] or [gamma] phase specimen) which has chemical composition of each phase of a DSS was prepared by preferential dissolution of the DSS, and dissolution behavior of each phase specimen was investigated. The [alpha] specimen showed a less-noble corrosion potential compared to the [gamma] specimen. The change of the corrosion potential of the DSS was located somewhere between those of each phase specimen. The [alpha] specimen showed a lessnoble active peak compared to the [gamma] specimen. The current density value of the DSS was located between the current values of each phase specimen. It was clearly shown that the corrosion mechanism of a DSS could be described through the dissolution behavior of single phases such as alpha phase and gamma phase.
引用
收藏
页码：17 / 22
页数：6
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