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Studies on influence of zinc immersion and fluoride on nickel electroplating on magnesium alloy AZ91D

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WOS被引频次:36
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成果类型:
期刊论文
作者:
Ziping Zhang;Gang Yu;Yuejun Ouyang;Xiaomei He;Bonian Hu;Jun Zhang;Zhenjun Wu
通讯作者:
Yu, G.(yuganghnu@163.com)
作者机构:
[Bonian Hu; Xiaomei He] Department of Chemistry and Chemical Engineering, Hunan Institute of Technology, Hengyang, 421002, China
[Ziping Zhang; Zhenjun Wu; Gang Yu; Jun Zhang; Yuejun Ouyang] State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
[Yuejun Ouyang] Department of Chemistry and Chemical Engineering, Huaihua College of Hunan, Huaihua, 418000, China
通讯机构:
[Yu, G] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
Magnesium alloy;Electroplating nickel;Zinc immersion;Fluoride;Adhesion;Corrosion resistance
期刊:
Applied Surface Science
ISSN:
0169-4332
年:
2009
卷:
255
期:
17
页码:
7773-7779
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:材料科学;WOS学科类别:Chemistry, Physical;Materials Science, Coatings & Films;Physics, Applied;Physics, Condensed Matter
入藏号:
WOS:000266567400054;EI:20092312114611
基金类别:
National Natural Science Foundation of China [50671036]; Hunan Scientific Projects [06JJ4013, 2008FJ3117]
机构署名:
本校为其他机构
院系归属:
材料与化学工程学院
摘要:
The effect of zinc immersion and the role of fluoride in nickel plating bath were mainly investigated in nickel electroplating on magnesium alloy AZ91D. The state of zinc immersion, the composition of zinc film and the role of fluoride in nickel plating bath were explored from the curves of open circuit potential (OCP) and potentiodynamic polarization, the images of scanning electron microscopy (SEM) and the patterns of energy dispersive X-ray (EDX). Results show that the optimum zinc film mixing small amount of Mg(OH)<inf>2</inf>and MgF<inf>2</inf>is obtained by zinc immersion for 30-90 s. The corrosion potential of magnesium alloy substrate attached zinc film will be increased in nickel plating bath and the quantity of MgF<inf>2</inf>sandwiched between magnesium alloy substrate and nickel coating will be reduced, which contributed to produce nickel coating with good performance. Fluoride in nickel plating bath serves as an activator of nickel anodic dissolution and corrosion inhibitor of magnesium alloy substrate. 1.0-1.5 mol dm<sup>-3</sup>of F<sup>-</sup>is the optimum concentration range for dissolving nickel anode and protecting magnesium alloy substrate from over-corrosion in nickel plating bath. The nickel coating with good adhesion and high corrosion resistance on magnesium alloy AZ91D is obtained by the developed process of nickel electroplating. This nickel layer can be used as the rendering coating for further plating on magnesium alloys. &copy;2009 Elsevier B.V. All rights reserved.
参考文献:
Aghion E, 2001, J MATER PROCESS TECH, V117, P381, DOI 10.1016/S0924-0136(01)00779-8
Baril G, 2001, CORROS SCI, V43, P471, DOI 10.1016/S0010-938X(00)00095-0
Blawert C, 2006, ADV ENG MATER, V8, P511, DOI 10.1002/adem.200500257
Chen JL, 2006, SURF COAT TECH, V201, P686, DOI 10.1016/j.surfcoat.2005.12.012
Chen XM, 2008, APPL SURF SCI, V255, P2322, DOI 10.1016/j.apsusc.2008.07.092

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