EXSITU SURFACE-ANALYSIS OF PASSIVE FILMS ON FE-CR ALLOYS - WHEN IS IT VALID

被引：23

作者：

BARDWELL, JA

SPROULE, GI

GRAHAM, MJ

机构：

[1] Institute for Microstructural Sciences, National Research Council, Ottawa, Ontario

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1993年 / 140卷 / 01期

关键词：

D O I：

10.1149/1.2056108

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Secondary ion mass spectroscopy (SIMS) combined with O-18-labeling experiments have been used to study the cathodic reducibility of the air-formed oxide on Fe-26Cr and Fe-6Cr alloys. Various pH oxalate, sulfate, acetate, and succinate buffer solutions were used as electrolytes. The prior film can be removed at pH 2.8 or less in the case of Fe-26Cr and at pH 5.6 or less for Fe-6Cr. Anodic polarization curves (5 MV s-1) did not provide any information about the extent of removal of the prior film. In addition, the air stability of the passive file formed on Fe-26Cr in pH 2.4 sulfate buffer was studied using O-18/SIMS. The films were not stable with respect to oxygen exchange at any potential in the passive region, suggesting that ex situ surface analysis must be used with great caution in investigating the composition of the passive film on Fe-26Cr.

引用

页码：50 / 53

页数：4

共 20 条

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[2] NATURE OF THE PASSIVE FILM ON FE-CR ALLOYS AS STUDIED BY O-18 SECONDARY ION MASS-SPECTROMETRY - REDUCTION OF THE PRIOR FILM AND STABILITY TO EXSITU SURFACE-ANALYSIS [J].