MECHANISM OF THE REVERSE DISSOLUTION OF ZINC IN THE PRESENCE OF NICKEL .2. INFLUENCE OF TRIETHYLBENZYLAMMONIUM CHLORIDE

Cyclic voltammetry and impedance measurements were used to investigate the influence of an additive, triethyl-benzyl-ammonium chloride, on t he kinetics of zinc deposition in acidic sulphate electrolytes contain ing Ni2+ ions able to induce the reverse dissolution of zinc deposits. It is shown that the adsorbed additive inhibits both the nucleation a nd growth of zinc deposits. By competing with the formation of a nicke l-containing surface compound responsible for a stimulation of hydroge n evolution, the additive adsorption also inhibits hydrogen evolution and thereby stabilizes the galvanostatic deposition of zinc.