Corrosion characteristic of pulsed electrodeposition nanocrystalline Ni-Co alloy coating

被引：0
|
作者：
Zhong, Yuanhui [1 ]
Dai, Pinqiang [1 ]
Xu, Weichang [1 ]
Chen, Shanshan [1 ]
机构：
[1] Fuzhou University, Fuzhou 350108, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2009年 / 38卷 / 06期
关键词：
Corrosion resistance - Corrosion resistant alloys - Cobalt alloys - Electrodes - Binary alloys - Grain refinement - Surface morphology - Alloying elements - Corrosive effects - Corrosion resistant coatings - Electrodeposition - Sodium chloride - Nanocrystalline alloys - Nanocrystals;
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摘要：
The microstructures, the surface morphology and the composition of nanocrystalline Ni and nanocrystalline Ni-Co alloy prepared by pulse electrodeposition have been studied by XRD, SEM and EDS. The corrosion behaviors of nanocrystalline nickel and Ni-Co alloys in the solutions containing 305% (mass fraction) NaCl and 5% (mass fraction) were investigated by soak method and electrochemical polarization method respectively. The experimental results indicate that typical nanocrystalline nickel and Ni-Co alloy coatings can be synthesized by pulse electrodeposition, and the alloying element Co had an effect of solution strengthening and grain size refinement. The nanocrystalline Ni-Co alloy is dense in nature and it exhibited better corrosion resistance in 3.5% (mass fraction) NaCl solution and 5% (mass fraction) HCl solution than the nanocrystalline nickel. The surface morphology of all samples after corrosion in 3.5% (mass fraction) NaCl solution show good corrosion resistance, however, the samples were uniformly corroded in 5% (mass fraction) HCl solution. © 2009, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
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页码：1053 / 1057
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