Electrochemical Mechanism of Nickel and Zinc-Nickel Alloy Electrodeposition

Abstract

The mechanism of electrochemical deposition of nickel and zinc-nickel alloy was described as in actually science literature. To prove practically the proposed mechanism, it was used as interesting effect which consists in an increase of the deposited mass more than Faraday law predicts. Nickel was deposited and zinc-nickel alloy was codeposited using a potentiostat-galvanostat Parstat 2273 coupled with an Electrochemical Quartz Crystal Microbalance (EQCM). The mass distribution of deposited metal and alloy was monitored during the process, together with electrochemical parameters (potential, current density, and temperature). The electrodeposited layers were characterized with SEM-EDX techniques. A mathematical relation referring to the process was proposed in order to describe the evolution of mass electrode versus time in the first step of the electrodeposition.

Zn–Ni compositionally modulated multilayered alloy coatings for improved corrosion resistance

“…The mechanism of Zn–Ni alloy deposition on to MS substrate, the chemical reactions that occur on the cathode (MS) follow two steps, as described in [11,12]. Zinc ions and Nickel ions are deposited on the MS substrate.…”

“…This may be explained by 'hydroxide suppression mechanism', where zinc hydroxy compounds inhibit the nickel deposition [7][8][9][10]. Vasilache et al described the mechanism of electrochemical deposition of nickel and zinc-nickel alloy [11,12].…”

Kinetics of Polarization Mechanisms

“…26,[28][29][30][31][32][33][34][35] In Fig. 5d, the experimental curve of current density versus time in an oxygen reduction reaction, which was reported by Bergel et al 17 among several supporting data, 17,[36][37][38][39][40] is compared with the theoretical calculations to illustrate the electrochemical theory. The two particle number constants of activation and concentration polarization are required to validate the theoretical values.…”

Experimental Investigation of Nickel Electrodeposits Brightness in the Presence of Surfactants: Modeling, Optimization and Polarization Studies

“…Recently, in a comparative study between five additives [22], the PVP is found to be the best additive which decreased grain size of the copper powder to a minimum threshold. To the best of our knowledge, a very few studies have been dedicated to the study of PVP effect on nickel electrodeposition [24]. Furthermore, and unlike SDS, no report has been published on the effect of PVP on the brightness of nickel electrodeposition.…”