Electrochemical behaviour of passive films on molybdenum-containing austenitic stainless steels in aqueous solutions

被引：163

作者：

Ameer, MA ^{[1
]}

Fekry, AM ^{[1
]}

Heakal, FET ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2004年 / 50卷 / 01期

关键词：

corrosion; electrochemical impedance spectroscopy; molybdenum; polarization; stainless steel alloys;

D O I：

10.1016/j.electacta.2004.07.011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

Passivation and its breakdown reactions have been studied on Mo-containing stainless steel specimens using different electrochemical techniques. Mo-containing stainless steel specimens were polarized in both naturally aerated NaCl and Na2SO4 solutions of different concentrations at 25 +/- 0.2degreesC between -1000 and 1500 mV versus saturated calomel electrode (SCE). The results of potentiodynamic polarization showed that i(corr) and i(c) increases with increasing either Cl- or SO42- concentration indicating the decrease in passivity of the formed film. EIS measurements under open circuit conditions confirmed that the passivity of the film decrease with increase in either Cl- or SO42- concentration. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：43 / 49

页数：7

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