Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C

IMR OpenIR

	Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C
	C. L. Zeng; W. Wang; W. T. Wu
	2000
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	53 期号:3-4 页码:289-302
摘要	The corrosion of Ni and FeAl in molten (0.62Li, 0.38K)(2)CO3 mixtures at 650 degrees C in air has been examined by the electrochemical-impedance spectroscopy (EIS) technique. The impedance spectra for Ni showed the typical characteristics of a diffusion-controlled reaction, i.e., a semicircle at the high-frequency port and a line at the low-frequency port. The corrosion of FeAl also presented the feature of a diffusion-controlled reaction during initial immersion. However, the impedance spectra were composed of two capacitance loops after some immersion time. The change of rite impedance spectra with immersion time may be ascribed to the formation of continuous external LiFeO2 and an inner Al2O3 layer. Equivalent circuits representing thefeatur es of the corrosion of Ni and FeAl were proposed to fit the impedance spectra and electrochemical parameters in the equivalent circuits were also calculated Based on the measurement of diffusion impedance, the diffusion of O-2(-) was proposed to be the predominant feature of oxygen reduction.
部门归属	inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china.;zeng, cl (reprint author), inst corros & protect met, state key lab corros & protect, wencui rd 62, shenyang 110015, peoples r china
关键词	Ni Feal Molten Carbonates Electrochemical Impedance Gas Electrode-reactions Oxygen Reduction Carbonate Media Melts
URL	查看原文
WOS记录号	WOS:000085772400004
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37237
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. L. Zeng,W. Wang,W. T. Wu. Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C[J]. Oxidation of Metals,2000,53(3-4):289-302.
APA	C. L. Zeng,W. Wang,&W. T. Wu.(2000).Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C.Oxidation of Metals,53(3-4),289-302.
MLA	C. L. Zeng,et al."Electrochemical-impedance study of the corrosion of Ni and FeAl intermetallic alloy in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C".Oxidation of Metals 53.3-4(2000):289-302.