Electrochemical corrosion characterization of Al-Ni alloys in a dilute sodium chloride solution

被引：62
作者：
Osorio, Wislei R. [1 ]
Peixoto, Leandro C. [1 ]
Cante, Manuel V. [1 ]
Garcia, Amauri [1 ]
机构：
[1] Univ Estadual Campinas, Dept Mat Engn, FEM Fac Engn Mecan, BR-13083860 Campinas, SP, Brazil
来源：
ELECTROCHIMICA ACTA | 2010年 / 55卷 / 13期
基金：
巴西圣保罗研究基金会;
关键词：
Al-Ni alloys; Microstructure; Intermetallic Al3Ni particles; Electrochemical impedance spectroscopy; MECHANICAL-PROPERTIES; CASTING ALLOYS; BEHAVIOR; MICROSTRUCTURE; RESISTANCE; SI; INTERMETALLICS; TITANIUM; EVOLUTION; ROLES;
D O I：
10.1016/j.electacta.2010.02.029
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The aim of this study is to characterize the electrochemical corrosion resistance of Al-Ni alloy samples which were directionally solidified under upward unsteady state heat flow conditions. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques were used to analyze the corrosion resistance in a dilute 0.05 M NaCl solution at 25 degrees C. Equivalent circuit analyses were also conducted. It was found that microstructural features such as the dendritic arrangement and the distribution of Al3Ni intermetallic particles have important roles on both the resulting pitting potential and the general corrosion resistance of Al-Ni alloys. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4078 / 4085
页数：8
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