Electrodeposition of aluminum and aluminum—magnesium alloys at room temperature

Electrodeposition of aluminum from benzene-tetrahydrofuran-AlCl 3 -LiAlH 4 was studied at room temperature. Galvanostatic electrolysis was used to investigate the effect of various parameters on deposit morphology and crystal size, including current density, temperature, molar ratio of benzene/tetra...

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Bibliographic Details
Published in:Journal of Central South University 2015-10, Vol.22 (10), p.3689-3697
Main Authors: Kan, Hong-min, Zhu, Shan-shan, Zhang, Ning, Wang, Xiao-yang
Format: Article
Language:English
Subjects:
Engineering
Metallic Materials
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Summary:Electrodeposition of aluminum from benzene-tetrahydrofuran-AlCl 3 -LiAlH 4 was studied at room temperature. Galvanostatic electrolysis was used to investigate the effect of various parameters on deposit morphology and crystal size, including current density, temperature, molar ratio of benzene/tetrahydrofuran and stirring speed. The deposit microstructure was adjusted by changing the parameters, and the optimum operating conditions were determined. Dense, bright and adherent aluminum coatings were obtained over a wide range of current densities (10–25 mA/cm 2 ), molar ratio of benzene and tetrahydrofuran (4:1 to 7:8) and stirring speeds (200–500 r/min). Smaller grain sizes and well-adhered deposits were obtained at lower temperatures. Aluminum-magnesium alloys could potentially be used as hydrogen storage materials. A novel method for Al—Mg deposition was proposed by using pure Mg anodes in the organic solvents system benzene-tetrahydrofuran—AlCl 3 —LiAlH 4 . XRD shows that the aluminum—magnesium alloys are mainly Al 3 Mg 2 and Al 12 Mg 17 .
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-015-2911-1