Abstract
Kinetics of the contact deposition of nickel on aluminum from alkaline ammonia solutions of different composition is studied by methods of voltammetry, gravimetry, and x-ray fluorescent analysis. It is shown that conventional voltammetric diagrams cannot be applied for determining the contact-exchange, current because they represent the net curve reflecting the conjugate processes of metal dissolution and cathodic hydrogen evolution. In connection with this, we propose determining the contact-exchange and aluminum dissolution rates from a cathodic voltammogram of a nickel electrode in the working solution.
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