Beneficial effects of Co(2+) on co-electrodeposited Ni-SiC nanocomposite coating

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	Beneficial effects of Co(2+) on co-electrodeposited Ni-SiC nanocomposite coating
	X. Y. Yang; K. J. Li; X. Peng; F. H. Wang
	2009
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	19 期号:1 页码:119-124
摘要	Ni-SiC nanocomposites were fabricated by co-electrodeposition of nickel with silicon carbide nanoparticles on the pure nickel substrates from a nickel sulfate bath with and without the addition of Co(2+). The presence of Co(2+) in the electrolyte modifies the Ni matrix to Ni-Co solid solution matrix. It helps to refine the grain size of the nanocomposite coating and improves the content of SiC dispersed in the matrix, and consequently results in higher microhardness. The cathodic polarization curves and electrochemical impedance spectroscopy (EIS) at cathodic potential were investigated in the electrolyte with and without Co(2+). A modified cathodic polarization curve with a positive shift in reduction potential and a smaller capacitive loop of EIS are observed. These are attributed to the strong adsorption of Co(2+) on the SiC nanoparticles. Consequently, it increases the forces of electrostatic attraction between the SiC nanoparticles and the cathode, which promotes the codeposition of SiC nanoparticles in the matrix.
部门归属	[yang xiu-ying; li kang-ju] shenyang ligong univ, polytech sch, fushun 113122, peoples r china. [yang xiu-ying; peng xiao; wang fu-hui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;yang, xy (reprint author), shenyang ligong univ, polytech sch, fushun 113122, peoples r china;xyyang0821@163.com
关键词	Ni-sic Co(2+) Addition Co-electrodeposition Nanocomposite Composite Coatings Electrochemical Codeposition Corrosion-resistance Oxidation Behavior Inert Particles Nickel Matrix
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32495
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Y. Yang,K. J. Li,X. Peng,et al. Beneficial effects of Co(2+) on co-electrodeposited Ni-SiC nanocomposite coating[J]. Transactions of Nonferrous Metals Society of China,2009,19(1):119-124.
APA	X. Y. Yang,K. J. Li,X. Peng,&F. H. Wang.(2009).Beneficial effects of Co(2+) on co-electrodeposited Ni-SiC nanocomposite coating.Transactions of Nonferrous Metals Society of China,19(1),119-124.
MLA	X. Y. Yang,et al."Beneficial effects of Co(2+) on co-electrodeposited Ni-SiC nanocomposite coating".Transactions of Nonferrous Metals Society of China 19.1(2009):119-124.