Electrochemical Behavior and Stability of Cu-Al-Ni Alloys in NaOH Solutions

被引：10

作者：

Badawy, Waheed A. ^{[1
]}

El-Rabiei, Mohammed M. ^{[2
]}

Helal, Nadia H. ^{[2
]}

Nady, Hashem M. ^{[2
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Chem, Giza 12613, Egypt

[2] Fayoum Univ, Fac Sci, Dept Chem, Al Fayyum, Egypt

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 2013年 / 227卷 / 08期

关键词：

Alloys; Corrosion; Electrochemical Techniques; Passivation; SEM; NEUTRAL CHLORIDE SOLUTIONS; COPPER-NICKEL-ALLOYS; AQUEOUS-SOLUTIONS; LOCALIZED CORROSION; ALKALINE-SOLUTIONS; PASSIVATION; ELECTRODE; KINETICS; COBALT; MEDIA;

D O I：

10.1524/zpch.2013.0347

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 behavior of copper-aluminum-nickel alloy with different Ni content in sodium hydroxide solutions was investigated. The alloys are usually used as tubes and reservoirs in basic solutions for the production of salts from marine solutions. The role of the Ni-content on the corrosion resistance of the alloy was evaluated. Different electrochemical methods were used. The increase of the nickel content in the alloy and increased immersion time in the solution improve the alloy stability due to the formation of a stable passive film. The experimental impedance data were fitted to theoretical data. The results of these experiments are discussed in reference to potential-pH (Pourbaix) diagrams. Surface morphology and barrier film constituents were examined by SEM.

引用

页码：1143 / 1158

页数：16