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电化学(中英文) ›› 2015, Vol. 21 ›› Issue (2): 172-180.  doi: 10.13208/j.electrochem.140603

• 研究论文 • 上一篇    下一篇

采用AlCl3-Emic-MgCl2室温离子液体电沉积制备铝-镁合金

M. RostomAli1,2*, Andrew P. Abbott1, Karl S. Ryder1   

  1. 1. 莱斯特大学化学系, 莱斯特 LE1 7RH, 英国; 2. 拉杰沙溪大学应用化学与化工系, 拉杰沙溪-6205, 孟加拉共和国
  • 收稿日期:2014-06-03 修回日期:2014-07-28 出版日期:2015-04-28 发布日期:2015-04-23
  • 通讯作者: M. RostomAli E-mail:dmrali@yahoo.com
  • 基金资助:

    The authors gratefully acknowledge the Commonwealth Scholarship Commission and British Council in the UK for financial support of this work.

Electrodeposition of Al-Mg Alloys from Acidic AlCl3-Emic-MgCl2 Room Temperature Ionic Liquids

M. RostomAli1,2*, Andrew P. Abbott1, Karl S. Ryder1   

  1. 1. Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK; 2. Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Received:2014-06-03 Revised:2014-07-28 Published:2015-04-28 Online:2015-04-23
  • Contact: M. RostomAli E-mail:dmrali@yahoo.com
  • Supported by:

    The authors gratefully acknowledge the Commonwealth Scholarship Commission and British Council in the UK for financial support of this work.

摘要: 采用恒电流和恒电位技术,以及路易斯酸氯化铝(III)-1-乙基-3-甲基咪唑氯化物离子液体中添加氯化镁(II),室温下在铂和铜阴极表面电沉积制备了铝-镁合金. 合金层中镁的含量随离子液体中氯化镁浓度和所施加的阴极电流密度的增加而增加. 采用X-射线衍射谱(XRD)、扫描电子显微镜(SEM)和能量散射X-射线谱(EDAX)技术,研究了不同电沉积实验条件得到的电沉积层的晶体结构及表面形貌. 增加沉积电流密度,可以制备出致密、光亮和结合力良好的电沉积层. 铝-镁合金电沉积的阴极电流效率可达99%. 应用电化学石英晶体微天平(EQCM)技术研究了电沉积合金的组成. 根据重声阻抗分析得到的质量-电荷(m-Q)曲线斜率计算了金属共沉积层的化学成分.

关键词: 电沉积, 铝-镁合金, 离子液体, 循环伏安, 恒电位

Abstract: Electrodeposition of aluminium-magnesium alloys have been carried out onto platinum and copper cathodes from Lewis acidic aluminium(III) chloride-1-ethyl-3-methylimidazolium chloride ionic liquid containing magnesium(II) chloride by constant current and constant potential methods at room temperature. Magnesium content in the deposited alloy increases with increasing MgCl2 concentration in the ionic liquid and with increasing cathodic current density. The influences of various experimental conditions on electrodeposition and the morphology of the electrodeposited layers have been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDAX). On increasing the deposition current densities the dense, bright, adherent and smooth electrodeposited layers are obtained. The cathodic current efficiency for the deposition of Al-Mg alloys is about 99%. The electrochemical quartz crystal microbalance (EQCM) has been used to study alloy deposition. The composition of the metal co-deposit has been calculated from the slopes of the mass-charge (m-Q) plots of gravimetric acoustic impedance analysis.

Key words: electrodeposition, Al-Mg alloys, ionic liquids, cyclic voltammetry, constant potential

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