Breakdown of valve metal passivity induced by aggressive anions

被引：22

作者：

Davydov, AD ^{[1
]}

机构：

[1] AN Frumkin Electrochem Inst, Moscow 117071, Russia

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 24-25期

关键词：

passivity breakdown; valve metals; anodic oxide films; radioactive tracer;

D O I：

10.1016/S0013-4686(01)00664-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

As an example of the anodic behavior of niobium in bromide solutions, an effect of the following factors on the process of breakdown of valve metal passivity is shown: the adsorption of aggressive anions and their incorporation into the anodic oxide film; the solution composition including the concentration of aggressive ions and the presence of foreign substances; the solvent essence, and defects of the oxide film. A physical model of the breakdown process is also proposed. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：3777 / 3781

页数：5

共 15 条

[11] THE POINT-DEFECT MODEL FOR THE PASSIVE STATE [J].