Kinetics of anodic dissolution of iron-chromium alloys in weak acid solutions. Part I. Potentiodynamic and potentostatic investigations

被引：0

作者：

Garz, I. ^{[1
]}

Bluemel, U. ^{[1
]}

Worch, H. ^{[1
]}

机构：

[1] Wissenschaftsbereich, Werkstofftechnik, Magdeburg, Germany

来源：

Werkstoffe und Korrosion | 1990年 / 41卷 / 10期

关键词：

Acids--Solutions; -; Corrosion;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The kinetic of dissolution in the active and prepassive range of FeCrX alloys (X = 4.5; 11.7; 12.7; 13.6; 14.7 and 20.8 M%) was investigated in dearated borate solutions (pH 3.5-5.45) and compared with corresponding data for Fe. After cathodic reduction instationary current density-potential curves were measured by fast potentiodynamic polarisation (10 mV/s) supplemented by potentiostatic investigation of FeCr 11 and FeCr 13 in the quasisteady state. Alloys up to 12.7% Cr offers in the non-steady state iron like behaviour with regard to the kinetic data, but the anodic curves are shifted to more negative potentials and to smaller current densities. This is supposed to be caused by Cr(OH)3 formation at an early stage of polarisation. At higher Cr-content only the prepassive range exists.

引用

页码：571 / 577