| 镁合金电沉积镍形成机理及电镀工艺的研究 |
| |
| 引用本文： | 余刚,易祥榕,雷细平,张资平,胡波年,何晓梅.镁合金电沉积镍形成机理及电镀工艺的研究[J].电镀与环保,2009,29(1). |
| |
| 作者姓名： | 余刚 易祥榕 雷细平 张资平 胡波年 何晓梅 |
| |
| 作者单位： | 1. 湖南大学,化学生物传感与计量学国家重点实验室,湖南,长沙,410082
2. 湖南工学院化学化工系,湖南,衡阳,421008 |
| |
| 基金项目： | 国家自然科学基金，湖南省科技项目 |
| |
| 摘 要： | 分析了浸锌层的作用机理,利用恒电势下电流密度随时间的变化和开路电势随时间变化的曲线,研完了镍在浸锌层上的形成机理.研究发现:镍的电沉积形核过程为连续形核,超电势增加时,晶核数迅速增加;镍层的生长过程遵循VolmerWeber模式;浸锌层能明显改善镀层结合力.在镀镍溶液中加入晶粒细化剂,细化了镀层晶粒,提高了镀层性能.X射线衍射表明:晶粒细化剂加入后,镍层晶粒明显细化,平均柱径约为26 nm,镍层表现为(111)择优取向.纳米晶镍层具有优良的性能,15μm厚的镀层24 h中性盐雾实验的保护等级为9级,热震和划痕试验表明结合力良好.
|
| 关 键 词： | 镁合金 预镀镍 形成机理 晶粒细化 |
Study of Formation Mechanism of Nickel Crystal and Nickel Preplating on Magnesium Alloys |
| |
| YU Gang,YI Xiang-rong,LEI Xi-ping,ZHANG Zi-ping,HU Bo-nian,HE Xiao-mei.Study of Formation Mechanism of Nickel Crystal and Nickel Preplating on Magnesium Alloys[J].Electroplating & Pollution Control,2009,29(1). |
| |
| Authors: | YU Gang YI Xiang-rong LEI Xi-ping ZHANG Zi-ping HU Bo-nian HE Xiao-mei |
| |
| Affiliation: | 1.State Key Laboratory of Chemo/Biosensing and Chemometrics;Changsha 410082;China;2.Department of Chemistry and Chemical Engineering;Hunan Institute of Technology;Hengyang 421008;China |
| |
| Abstract: | The function mechanism of zinc immersion film was analyzed.The formation mechanism of zinc coating on magnesium alloys was investigated by using current density-time and open potential-time curves at constant potential.It is found that the electrocrystallization of nickel on magnesium alloy is a successive nucleation process.With the increase of deposition overpotential,the crystal nucleus dots will increase rapidly.The growth of nickel coating obeys Volmer-Weber mode. Zinc immersion film can obviously impr... |
| |
| Keywords: | magnesium alloy nickel pre-plating formation mechanism crystal refining |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
