ELECTRODEPOSITION OF NI-ZN ALLOY .2. ELECTROCRYSTALLIZATION OF ZN, NI, AND NI-ZN ALLOY

The initial stages of the electrodeposition of nickel, zinc, and nicke l-zine alloy were investigated by nucleation analysis. A novel deconvo lution technique was applied to obtain the individual chronoamperometr y of each species and elucidate the nucleation and growth mechanism of nickel-zine alloy deposition. In agreement with earlier conclusions ( part I of this study), codeposition of hydrogen and nickel occurs in t he initial stage of deposition. Adsorption and evolution of hydrogen a re significant and cause the enhancement of nickel content. From the d econvoluted chronoamperograms of nickel-zinc deposition, we see that t he nucleation and growth mechanism of the alloy is similar to that of the pure metals (i.e., nickel or zinc). This similarity implies a weak interaction between nickel and zinc nuclei in the initial stages of d eposition.