INSITU XANES DETECTION OF CR(VI) IN THE PASSIVE FILM ON FE-26CR

被引：55

作者：

BARDWELL, JA ^{[1
]}

SPROULE, GI ^{[1
]}

MACDOUGALL, B ^{[1
]}

GRAHAM, MJ ^{[1
]}

DAVENPORT, AJ ^{[1
]}

ISAACS, HS ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1992年 / 139卷 / 02期

关键词：

D O I：

10.1149/1.2069224

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The passive film on sputter deposited thin film Fe-26Cr electrodes has been examined using the technique of in situ x-ray absorption near edge spectroscopy (XANES). During the x-ray spectroscopic measurements, the sample was maintained under electrochemical control in the pH 8.4 borate buffer electrolyte. The appearance of the distinctive Cr(VI) XANES pre-edge peak can be correlated with the transpassive wave in cyclic voltammogram, and its disappearance with the corresponding reduction wave. The formation and reduction of Cr(VI) was reversible, and only small amounts were detected in the film. Cr(VI) in the passive film is not indefinitely stable, and it is completely absent after long periods of air exposure.

引用

页码：371 / 373

页数：3

共 9 条

[1] 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].