Scanning electrochemical microscopy detection of dissolved sulfur species from inclusions in stainless steel

被引：111

作者：

Paik, CH ^{[1
]}

White, HS

Alkire, RC

机构：

[1] Univ Illinois, Dept Chem Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

[3] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 11期

关键词：

D O I：

10.1149/1.1394028

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The dissolution of MnS inclusions in stainless steels (SS) 303 and 304 during initiation of pitting corrosion in an aqueous solution containing 10 mM KI and 0.1 M NaCl was investigated with use of a scanning electrochemical microscope (SECM). The dissolution products of MnS were detected amperometrically at a carbon fiber SECM tip using I-/I-3(-) as the redox mediator. SECM images showed that the sulfur species are slowly generated above previously identified MnS inclusions. The SECM tip current was stable up to 100 min, depending on the potential applied to the SS 304. SECM was found to be useful in mapping local concentration distributions of sulfur and their evolution in time during dissolution. (C) 2000 The Electrochemical Society. S0013-4651(00)02-085-1. All rights reserved.

引用

页码：4120 / 4124

页数：5

共 30 条

[1]

Bard A.J., 1994, ELECTROANAL CHEM, V18, A., P243

[2] Scanning electrochemical microscopy: Measurement of the current density at microscopic redox-active sites on titanium [J].