Electrochemical studies of pitting corrosion of Cu-Fe alloy in sodium chloride solutions

被引：10

作者：

Mahmoud, S. S. ^{[1
]}

机构：

[1] Ain Shams Univ, Dept Chem, Univ Coll Girls Arts Sci & Educ, Cairo, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 457卷 / 1-2期

关键词：

pitting corrosion; potentiodynamic impedance spectroscopy; inhibiting effect of inorganic additives;

D O I：

10.1016/j.jallcom.2008.01.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical studies of pitting corrosion of Cu-Fe alloy (70% Cu-30% Fe) were carried out in sodium chloride solutions. The techiniques of measurements were: open-circuit potential, potentiodynamic polarization and electrochemical impedance spectroscopy. The effect of different concentrations of the inorganic additives (WO42-, PO43-, NO2-, B4O72- and CrO42-) on the pitting corrosion of the alloy in 0.5 M NaCl was also studied. It was found that the alloy underwent pitting corrosion in sodium chloride solution at definite pitting potential depending on the concentration of NaCl according to the relation: E-pit = a(1) - b(1) log CCl-. The investigated inorganic additives had inhibiting effect on the pitting corrosion of the alloy in 0.5 M NaCl and their efficiency decreases according to the order WO42- > PO43- > NO2- > B4O72- > CrO42-. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：587 / 592

页数：6

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