Electrodeposition of Nanocrystalline Ni-W Coatings with Citric Acid System

被引:13
作者
Du, Jingjing [1 ,2 ]
Xu, Lijian [1 ,2 ]
Chen, Baizhen [1 ]
Li, De [3 ]
机构
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Hunan Univ Technol, Hunan Key Lab Green Packaging & Applicat Biol Nan, Zhuzhou 412008, Peoples R China
[3] Hunan Changgao High Voltage Switchgear Grp Co Ltd, Changsha 410219, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
Ni-W Alloy Coatings; Citric Acid; Nanocrystalline; Electrodeposition; ELECTROCHROMIC PROPERTIES; NANOPARTICLES; RESISTANCE;
D O I
10.1166/jnn.2013.6850
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ni-W alloy coatings were prepared by electrodeposition technique with citric acid as a complexing agent. The influence of the main technical parameters on W content in the Ni-W alloy coatings were investigated by electron dispersive spectroscopy (EDS), and the microstructure of the coatings was characterized and analyzed by employing X-ray diffractometer (XRD), scanning electron microscope (SEM). The results showed that bright and compact Ni-W alloy coatings with 25.78 wt% W were obtained when the concentration of Na2WO4 center dot 2H(2)O was 50 g/L, the concentration of NH4Cl was 20 g/L, the bath pH value was 8.0 and the bath temperature was 70 degrees C. The surface of Ni-W alloy coatings were bright, flat and compact, the mircostructure of the alloy coatings were nanocrystalline and the average grain size was about 38 nm by calculating using Scherrer Equation.
引用
收藏
页码:690 / 693
页数:4
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