SCANNING ELECTROCHEMICAL MICROSCOPY OF PRECURSOR SITES FOR PITTING CORROSION ON TITANIUM

被引：130

作者：

CASILLAS, N ^{[1
]}

CHARLEBOIS, SJ ^{[1
]}

SMYRL, WH ^{[1
]}

WHITE, HS ^{[1
]}

机构：

[1] UNIV UTAH,DEPT CHEM,SALT LAKE CITY,UT 84112

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1993年 / 140卷 / 09期

关键词：

D O I：

10.1149/1.2220897

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Scanning electrochemical microscopy, SECM, of oxide-covered titanium foils (approximately 50 angstrom oxide thickness) immersed in potassium bromide solutions is reported. Electrogeneration of bromine (2 Br- --> Br2 + 2e-) at the TiO2 film is shown to occur rapidly at a few microscopic surface sites. The regions of intense faradaic activity observed in SECM images correlate directly with the location of pit nucleation. The direct correspondence between sites of faradaic activity and oxide breakdown provides a means of identifying precursor sites for pit formation.

引用

页码：L142 / L145

页数：4

共 19 条

[1]

Abd Rabboh M.F., 1974, LOCALIZED CORROSION

[2] PITTING OF TITANIUM .2. ONE-DIMENSIONAL PIT EXPERIMENTS [J].