Incorporation of Cr in the passive film on Fe from chromate solutions

被引：22

作者：

Isaacs, HS

Virtanen, S

Ryan, MP

Schmuki, P

Oblonsky, LJ

机构：

[1] Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA

[2] ETH Honggerberg, Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland

[3] ETH Honggerberg, Swiss Fed Inst Technol, Inst Mat Chem & Corros, CH-8093 Zurich, Switzerland

[4] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

[5] Univ Erlangen Nurnberg, LKO, Dept Mat Sci, D-91058 Erlangen, Germany

[6] DuPont Technol, Microcircuit Mat, Res Triangle Pk, NC 27709 USA

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 19期

关键词：

X-ray absorption spectroscopy; iron passivity; chromium species; chromate inhibitor; chromate adsorption;

D O I：

10.1016/S0013-4686(02)00231-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The uptake of Cr species from chromate solutions by Fe has been studied using X-ray absorption near edge structure (XANES). The objective of the investigation was to compare XANES with radioactive tracer techniques used by Brasher et al. Cr(III) was detected on the passive iron surface. The amount of Cr(III) was increased by cathodic polarization and decreased by anodic polarization. This demonstrated that the uptake of Cr(III) was the result of cathodic processes and was not a direct result of the growth of the passive oxide film. Cr(VI) was only found after Fe was exposed to a saturated dichromate solutions for extended periods indicating that Cr(VI) was not strongly absorbed on the passive film. (C) 2002 Published by Elsevier Science Ltd.

引用

页码：3127 / 3130

页数：4

共 15 条

[1] INSITU XANES DETECTION OF CR(VI) IN THE PASSIVE FILM ON FE-26CR [J].