Electrochemical preparation of NiAl intermetallic compound from solid oxides in molten CaCl2 and its corrosion behaviors in NaCl aqueous solution

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	Electrochemical preparation of NiAl intermetallic compound from solid oxides in molten CaCl2 and its corrosion behaviors in NaCl aqueous solution
	H. Y. Yin; T. Yu; D. Y. Tang; X. F. Ruan; H. Zhu; D. H. Wang
	2012
发表期刊	Materials Chemistry and Physics
ISSN	0254-0584
卷号	133 期号:1 页码:465-470
摘要	Nickel aluminide powders were prepared by direct electrochemical reduction of solid mixture of NiO-NiAl2O4 (Ni:Al = 1:1 in mol) precursor in molten CaCl2 at 850 degrees C. The reduction process of the solid oxide cathode was investigated by analyzing the intermediate products using X-ray diffraction (XRD) and scanning electron microscopy (SEM). It reveals that nickel is preferentially reduced and it benefits to prevent aluminum leaving from the cathode. The products obtained at the constant cell voltage electrolysis of 3.0 V for more than 4 h were stoichiometric NiAl. The energy consumption could be as low as 6.1 kWh (kg-NiAl)(-1) based on the applied cell voltage and the consumed electrolysis charge. Furthermore, the NiAl powders were made into a dense rod by spark plasma sintering (SPS) technique. The corrosion behaviors of the NiAl rod in 0.5 mol L-1 NaCl aqueous solution at room temperature were investigated by polarization curve and ac impedance measurements. It was found that the NiAl rod had satisfactory anti-corrosion ability in the solution. (C) 2012 Elsevier BM. All rights reserved.
部门归属	[yin, huayi; yu, tang; tang, diyong; ruan, xuefeng; zhu, hua; wang, dihua] wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china. [wang, dihua] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wang, dh (reprint author), wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china.;wangdh@whu.edu.cn
关键词	Corrosion Test Nickel Aluminide Electrochemical Reduction Molten Salt Electrolytic Reduction 3-phase Interlines Calcium-chloride Insulator Compounds Hydrogen-production Alloy Decomposition Methane Salts Mo
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60416
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Y. Yin,T. Yu,D. Y. Tang,et al. Electrochemical preparation of NiAl intermetallic compound from solid oxides in molten CaCl2 and its corrosion behaviors in NaCl aqueous solution[J]. Materials Chemistry and Physics,2012,133(1):465-470.
APA	H. Y. Yin,T. Yu,D. Y. Tang,X. F. Ruan,H. Zhu,&D. H. Wang.(2012).Electrochemical preparation of NiAl intermetallic compound from solid oxides in molten CaCl2 and its corrosion behaviors in NaCl aqueous solution.Materials Chemistry and Physics,133(1),465-470.
MLA	H. Y. Yin,et al."Electrochemical preparation of NiAl intermetallic compound from solid oxides in molten CaCl2 and its corrosion behaviors in NaCl aqueous solution".Materials Chemistry and Physics 133.1(2012):465-470.