Influence of amine additives on the electrodeposition of aluminum from alcl3-Dimethyl Sulfone Electrolytes

Abstract

Coating of Al on various materials contributes to increase the widespread use of Al and Al coated materials in various industrial applications. There are several methods applied for Al coating such as hot dipping, thermal spray, chemical vapor deposition, physical vapor deposition and electroplating. Low-temperature electroplating process is the most economical method. In this research, AlCl3/dimethyl sulfone has been proposed for electroplating at low temperature. Furthermore, the effect of amine additives on the thickness, stability and the purity of the deposited film were investigated. These amine group additives bring the change in the surface morphology and crystal orientation of the Al film. Preferential adsorption of amine groups on the surface of the aluminum film lead to reduction of Cl and S and consequently decrease the cracks from aluminum film surface.