Abstract
Nickel may be produced by electrolysis in acidic chloride based electrolytes. Nickel is initially deposited on stainless steel or titanium starting sheets while chlorine gas is evolved on DSA anodes. Stress in the nickel deposit may cause bending of the cathode sheet. Also irregular growth such as dendrite formation may occur. In extreme cases short circuiting of electrodes will happen. Fundamental electrochemical studies of the initial stages of the electrodeposition process may give valuable information for obtaining smooth nickel deposits. Initial experiments were carried out by using cyclic voltammetry on cathodes of titanium. Ongoing studies are performed by potential step chronoamperometry to study the nucleation and growth of nickel on titanium cathode substrates. Experiments to study the effect of electrolyte composition, pH and temperature on the nickel deposition process are under way. Electrolysis to deposit macroscopic amounts of nickel will be carried out to characterize the deposits by optical methods.
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