Electrochemical behaviour of Mo-containing austenitic stainless steels in buffer solution

被引：12

作者：

Heakal, FET ^{[1
]}

Ameer, MA ^{[1
]}

El-Aziz, AM ^{[1
]}

Fekry, AM ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Chem, Cairo, Egypt

来源：

MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2004年 / 35卷 / 06期

关键词：

austenitic steel; constant phase element; impedance; molybdenum; pH and polarization;

D O I：

10.1002/mawe.200400772

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of pH on the electrochemical behavior of austenitic stainless steels in naturally aerated and nitrogen-deaerated buffer solutions has been studied. Potentiodynamic and ac impedance techniques were used. The results indicate that corrosion current (I-corr) decreases with pH. By examining the impedance data for the seven tested steels under various conditions, it seems that the total resistance (R-T) value is a suitable indication parameter for explaining the role of molybdenum and the other supplementary alloying additions (Ni, N, Cu and Mn) on the passive film behaviors as a function of pH of the forming solutions. As a general trend, the R-T values for all steels tended to be lower in the basic buffer than in the acidic solutions.

引用

页码：407 / 412

页数：6