VISCOSITY, SPECIFIC CONDUCTIVITY AND DENSITY OF ORGANIC ELECTROLYTES USED IN ALUMINUM ELECTRODEPOSITION

The viscosity, conductivity and density of solutions of Al2Br6 in several aromatic solvents and solvents mixtures, have been determined. The conductivity and viscosity increase spontaneously with time. At a conductivity of 2.5 × 10-3Ω-1 cm-1 and 20°C, pseudocumene gives the highest viscosity value and ethylbenzene-toluene (1:1 volume) produces the lowest viscosity. The observed results have demonstrated a non-Stokesian behaviour for all the solutions studied and a relay type mechanism for the conductivity. The data presented should be useful in the design of industrial plating systems for aluminium electrodeposition from organic electrolytes.