Electrodeposition of aluminum on aluminum surface from molten salt

Wenmao HUANG, Xiangyu XIA, Bin LIU, Yu LIU, Haowei WANG and Naiheng MA State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China

摘 要：The surface morphology, microstructure and composition of the aluminum coating of the electrodeposition plates in AlCl 3 -NaCl-KCl molten salt with a mass ratio of 8:1:1 were investigated by SEM and EDS. The binding force was measured by splat-cooling method and bending method. The results indicate that the coatings with average thicknesses of 12 and 9 μm for both plates treated by simple grinding and phosphating are compacted, continuous and well adhered respectively. Tetramethylammonium chloride （TMAC） can effectively prevent the growth of dendritic crystal, and the anode activation may improve the adhesion of the coating. Binding force analysis shows that both aluminum coatings are strongly adhered to the substrates.

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