Platinum-induced oxidation of chromium in O2 at 800 °C

被引：15

作者：

Hultquist, G ^{[1
]}

Hörnlund, E ^{[1
]}

Dong, Q ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Mat Sci & Engn, Div Corris Sci, S-10044 Stockholm, Sweden

来源：

CORROSION SCIENCE | 2003年 / 45卷 / 12期

关键词：

chromium; platinum; SIMS; oxidation; surface diffusion;

D O I：

10.1016/S0010-938X(03)00117-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of porous Pt on the oxidation of Cr at 800degreesC have been studied with the (OSIMS)-O-18 technique, gas phase analysis and XPS. In oxide areas with Pt a pronounced inward oxygen transport takes place and a substantial oxide growth near the Cr substrate is observed. In oxide grown on areas without Pt the counts of CrO ions in SIMS and the binding energy of O (1s) in XPS depend on the distance from the area with Pt. The experimental observations are believed to be a consequence of a high dissociation efficiency of O-2 on areas with Pt in combination with a high diffusivity of O in external and internal oxide surfaces on areas both with and without Pt. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2697 / 2703

页数：7

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