Kinetic study of a novel electroless Ni-P deposition on AZ91D magnesium alloy using nickel hypophosphite as the metal salt

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	Kinetic study of a novel electroless Ni-P deposition on AZ91D magnesium alloy using nickel hypophosphite as the metal salt
	Wu, Liping; Yang, Zhongdong; Qin, Gaowu; Yang, ZD (reprint author), Northeastern Univ, Sch Met, Shenyang 110004, Peoples R China.
	2017-02-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	694 页码:1133-1139
摘要	A novel electroless nickel-phosphorus (Ni-P) process employing tetrasodium pyrophosphate and ammonium citrate as complexing agents and nickel hypophosphite as the nickel source which avoids the use of SO42- and Cl- ions was developed to improve the anti-corrosion properties of AZ91D magnesium alloy. The dependence of the electroless deposition rate on experimental parameters, the morphologies of the electroless deposit and the corrosion resistance of the electroless deposit were studied by the weight-gain method, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), respectively. An empirical equation was formulated to predict the Ni-P deposition rate. The results showed that tetrasodium pyrophosphate played a major role in the deposition process, followed by ammonium citrate, nickel hypophosphite, sodium hypophosphite and pH. The Ni-P coating significantly enhances the corrosion resistance of AZ91D Mg alloy. (C) 2016 Elsevier B.V. All rights reserved.; A novel electroless nickel-phosphorus (Ni-P) process employing tetrasodium pyrophosphate and ammonium citrate as complexing agents and nickel hypophosphite as the nickel source which avoids the use of SO42- and Cl- ions was developed to improve the anti-corrosion properties of AZ91D magnesium alloy. The dependence of the electroless deposition rate on experimental parameters, the morphologies of the electroless deposit and the corrosion resistance of the electroless deposit were studied by the weight-gain method, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), respectively. An empirical equation was formulated to predict the Ni-P deposition rate. The results showed that tetrasodium pyrophosphate played a major role in the deposition process, followed by ammonium citrate, nickel hypophosphite, sodium hypophosphite and pH. The Ni-P coating significantly enhances the corrosion resistance of AZ91D Mg alloy. (C) 2016 Elsevier B.V. All rights reserved.
部门归属	[wu, liping] chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china ; [yang, zhongdong] northeastern univ, sch met, shenyang 110004, peoples r china ; [qin, gaowu] northeastern univ, sch mat sci & engn, shenyang 110004, peoples r china
关键词	Az91d Magnesium Alloy Electroless Nickel Nickel Hypophosphite
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI
语种	英语
WOS记录号	WOS:000390622900145
引用统计	被引频次：28[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/321006/78292
专题	中国科学院金属研究所
通讯作者	Yang, ZD (reprint author), Northeastern Univ, Sch Met, Shenyang 110004, Peoples R China.
推荐引用方式 GB/T 7714	Wu, Liping,Yang, Zhongdong,Qin, Gaowu,et al. Kinetic study of a novel electroless Ni-P deposition on AZ91D magnesium alloy using nickel hypophosphite as the metal salt[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,694:1133-1139.
APA	Wu, Liping,Yang, Zhongdong,Qin, Gaowu,&Yang, ZD .(2017).Kinetic study of a novel electroless Ni-P deposition on AZ91D magnesium alloy using nickel hypophosphite as the metal salt.JOURNAL OF ALLOYS AND COMPOUNDS,694,1133-1139.
MLA	Wu, Liping,et al."Kinetic study of a novel electroless Ni-P deposition on AZ91D magnesium alloy using nickel hypophosphite as the metal salt".JOURNAL OF ALLOYS AND COMPOUNDS 694(2017):1133-1139.