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

Authors

RostomAli M., Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK;Department of Applied Chemistry and Chemical Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh;Follow
P. Abbott Andrew, Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK;
S. Ryder Karl, Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK;

Corresponding Author

RostomAli M.(dmrali@yahoo.com)

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.

Graphical Abstract

Keywords

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

DOI Link

https://doi.org/10.13208/j.electrochem.140603

Publication Date

2015-04-28

Online Available Date

2015-04-23

Revised Date

2014-07-28

Received Date

2014-06-03

Recommended Citation

RostomAli M., P. Abbott Andrew, S. Ryder Karl. Electrodeposition of Al-Mg Alloys from Acidic AlCl₃-Emic-MgCl₂ Room Temperature Ionic Liquids[J]. Journal of Electrochemistry, 2015 , 21(2): 172-180.
DOI: 10.13208/j.electrochem.140603
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss2/11