Abstract
This paper reports the results of analysis of magnetic field supported electrochemical deposition of Ni-TiO2 composite coatings from electrolytes containing nickel glycinate complexes. The effect of several parameters, including electrode potential, concentration of TiO2 in the electrolyte as well as value of magnetic field induction vector on deposition rate, composition, current efficiency, structure, surface states and surface morphology was described. Electrodeposited composites contained up to 1.43 wt% of TiO2. Depending on the applied electrolysis condition, current efficiency amounted to from 38 to 55.4% for B = 0 T and from 43.1 to 64.8 for B = 1 T. The electrochemical tests performed as well as determined diffusion coefficient values indicated that the magnetic field strongly influenced the kinetics of electrode processes. Voltammetric curves as well as further characterization of deposited coatings indicated that the deposition process is accompanied by precipitation of hydrides and hydroxides during electrolysis.
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