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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
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume694Pages:1133-1139
AbstractA 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.
description.department[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
KeywordAz91d Magnesium Alloy Electroless Nickel Nickel Hypophosphite
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78292
Collection中国科学院金属研究所
Corresponding AuthorYang, ZD (reprint author), Northeastern Univ, Sch Met, Shenyang 110004, Peoples R China.
Recommended Citation
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.
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