Effect of Deposition Conditions on Properties of Aluminum Deposit Obtained from Aluminum Chloride-Acetamide Melts

Although aluminum (Al) electrodeposition using nonaqueous solutions has been widely studied, the process cost is not low. Because aluminum chloride (AlCl 3 )-acetamide (AcA) deep eutectic solvent (DES) takes low cost and produce better Al deposits than the AlCl 3 -based ionic liquid in dry air process costs may be reduced. However, the effect of the Al electrodeposition conditions using the AlCl 3 -AcA DES has not been clear. We investigated the effect of the operating temperature on the properties of Al electrodeposition using the AlCl 3 -AcA melt. At the operating temperate of 50 °C, the grain shape was fine-scale, similar to the surface morphology of the deposit in the AlCl 3 -urea melt.In contrast, at the operating temperature of 90 °C, the grain shape changed to fine grains. Based on these results, it was revealed that the grain shape and the preferential orientation of the Al deposit would be affected by operating temperature.