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
收藏
页码：407 / 412
页数：6
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