FeAl-based coatings deposited by high-energy micro-arc alloying process for wet-seal areas of molten carbonate fuel cell

IMR OpenIR

	FeAl-based coatings deposited by high-energy micro-arc alloying process for wet-seal areas of molten carbonate fuel cell
	P. Y. Guo; C. L. Zeng; N. Wang; Y. Shao
	2012
发表期刊	Journal of Power Sources
ISSN	0378-7753
卷号	217 页码:485-490
摘要	The corrosion of bipolar plates is a great obstacle to the industrial application of molten carbonate fuel cell (MCFC). No electrical conductivity is needed for the wet-seal materials, thus the application of aluminum coatings is a very effective method to inhibit the corrosion of wet-seal areas of MCFC by the formation of a protective Al2O3 scale. In this work, a high-energy micro-arc alloying (HEMAA) process is attempted to prepare FeAl coatings on the type 316 stainless steel (316SS) as wet-seal material of MCFC using an FeAl intermetallic compound rod as the deposition electrode. The microstructure of the FeAl coatings is analyzed, and its corrosion behavior in molten (0.62Li, 0.38K)(2)CO3 at 650 degrees C in air is examined by electrochemical impedance spectroscopy. The experimental results indicate that the FeAl coating on 316SS is microcrystalline, with a metallurgic bonding with the substrate. The Nyquist plots for the corrosion of both the bare and the coated steel are all composed of double capacitive loops, but with significantly larger impedance values observed for the coated steel. The FeAl coatings increase greatly the corrosion resistance of 316SS by forming a compact and adhesive Al2O3 scale. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[guo, p. y.; zeng, c. l.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [guo, p. y.; wang, n.; shao, y.] jiangsu univ sci & technol, jiangsu prov key lab adv welding technol, zhenjiang 212003, jiangsu, peoples r china.;zeng, cl (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;clzeng@imr.ac.cn
关键词	Molten Carbonate Fuel Cell Wet-seal Area High-energy Micro-arc Alloying Process Iron Aluminide Coating Corrosion Electrochemical Impedance Spectroscopy Stainless-steel Interconnects Corrosion Behavior Separator Plates Reduction Oxygen Layer Ni Dy
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59975
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Y. Guo,C. L. Zeng,N. Wang,et al. FeAl-based coatings deposited by high-energy micro-arc alloying process for wet-seal areas of molten carbonate fuel cell[J]. Journal of Power Sources,2012,217:485-490.
APA	P. Y. Guo,C. L. Zeng,N. Wang,&Y. Shao.(2012).FeAl-based coatings deposited by high-energy micro-arc alloying process for wet-seal areas of molten carbonate fuel cell.Journal of Power Sources,217,485-490.
MLA	P. Y. Guo,et al."FeAl-based coatings deposited by high-energy micro-arc alloying process for wet-seal areas of molten carbonate fuel cell".Journal of Power Sources 217(2012):485-490.