Abstract:It is shown by cyclic voltammmetry and potentiostatic determination that, charge transfer in the electrodeposition of Al on Mo from AlCl₃-NaCl-KCl melt is reversible; the diffusion coefficient of Al₂Cl₇^- ions is quite small, and so are the nucleation rates and the saturated nucleus number densities, suggesting that by ordinary DC electroplating it is impossible to get high quality electroplates of pure Al with fine grains from this melt.

Key words: electroplating　AlCl₃-NaCl-KCl melt　electrodeposition　pure Al