Electrochemical Impedance Studies on the Corrosion of Cu-35Ni-10Al Alloy in a Molten (0.62Li, 0.38K)2CO3 Environment

被引：3
|
作者：
Ren, Yanjie [1 ,2 ]
Peng, Yucheng [1 ,2 ]
Chen, Jian [1 ,2 ]
Qiu, Wei [1 ,2 ]
Li, Wei [1 ,2 ]
Li, Cong [1 ,2 ]
Niu, Yan [1 ,2 ]
机构：
[1] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Changsha 410114, Hunan, Peoples R China
[2] Changsha Univ Sci & Technol, Key Lab Energy Efficiency & Clean Utilizat, Educ Dept Hunan Prov, Changsha 410114, Hunan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2019年 / 14卷 / 07期
基金：
美国国家科学基金会;
关键词：
Cu-35Ni-10Al alloy; Molten carbonate fuel cell; Anode; Corrosion; Electrochemical impedance spectroscopy; CARBONATE FUEL-CELL; ANODE ELECTRODE; OXIDATION; CREEP; SALT;
D O I：
10.20964/2019.07.49
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Cu alloy is an anode material that can act as an alternative to Ni alloy in molten carbonate fuel cells (MCFCs) because of its thermodynamic stability in the anode gas atmosphere and its lower cost. To evaluate its potential application as an anode material for MCFCs, the high-temperature corrosion behaviour of cast Cu-35Ni-10Al alloy was studied in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C in air by electrochemical impedance spectroscopy. An equivalent circuit is proposed to fit the impedance spectroscopy results. The values of R-t decreased with the immersion time, suggesting an enhanced corrosion rate. A porous and layered scale formed on the alloy after immersion for 48 h in the melt. Internal oxidation was observed in the Cu-rich zone of the alloy.
引用
收藏
页码：6147 / 6153
页数：7
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