Abstract
The process of electrodeposition of zinc plating in the galvanostatic mode of pulse electrolysis is studied. Having analyzed periodical and reference literature, we selected zincate electrolyte containing ECOMET C1 brightening additive as the research object. Based on the analysis of experimental data, we have revealed dependences of cathode current efficiency of zinc and the deposition rate of coatings on the values of current density in pulse, frequency and duty cycle of a pulse current, temperature, and the concentration of sodium hydroxide and zinc ions in solution. Using the galvanostatic mode of pulse electrolysis made it possible to increase the current density by 25%, and to reduce the concentration of brightening additives with a constant coating quality, in comparison with the stationary mode. Based on the conducted research, the modes of forming high-quality zinc plating at a speed of up to 40 μm/h are recommended.
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