On the influence of sol-gel derived CeO2 coatings on high-temperature oxidation of Co, Ni and Cu

被引：32

作者：

Haugsrud, R ^{[1
]}

机构：

[1] Univ Oslo, Ctr Mat Sci, Dept Chem, N-0349 Oslo, Norway

来源：

CORROSION SCIENCE | 2002年 / 44卷 / 07期

关键词：

sol-gel based CeO2 coatings; high-temperature oxidation mechanism; Co; Ni; Cu; grain boundary segregation;

D O I：

10.1016/S0010-938X(01)00155-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of CeO2 coatings on high-temperature oxidation of Co, Ni and Cu have been investigated as a function of temperature at oxygen pressures from 1x10(-4) to 1 atm. The oxidation mechanisms for Co and Cu are essentially unaffected by CeO2 coatings, whereas the oxidation rate of Ni decreases by approximately one order of magnitude. The oxygen pressure dependence does not change markedly with CeO2 coatings for any of the metals studied. For oxidation of Ni plus CeO2 coatings, the temperature dependence is less marked at lower temperatures, whereas essentially the same behavior is observed for Co and Cu with and without the coating. Differences in the effects of CeO2 coatings for the three metal systems have been attributed to the relative influence of grain boundary transport on the overall rates of oxidation. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1569 / 1582

页数：14

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