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
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
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