Electrodeposition of Zn-Ta Coating from DMI-ZnCl2-TaCl5 Solvate Ionic Liquids

In this work, the Zn-Ta coating was electrodeposited from DMI-ZnCl2-TaCl5 solvate ionic liquid. The electrochemical reaction was studied by cyclic voltammetry using titanium as working electrode. The onset potential of zinc and tantalum co-deposition was -0.7 V (vs. Ag). Moreover, potentiostatic electrodeposition experiments were conducted to investigate the influence of potential and temperature on the morphology of the coating. X-ray photoelectron spectroscopy analysis confirmed that the coating obtained by electrodeposition at -1.6 V (vs. Ag) and 353 K was composed of Zn, Ta, ZnO, and Ta2O5. The mass fraction of element tantalum was 6.21 %, and metallic tantalum accounted for 11.54% of the mass of element tantalum. The corrosion current density of the Zn-Ta coating was 1.83 x 10(-4) Acm(-2). (C) The Author(s) 2021. Published by ECSJ.

Automated summary

In this study, a Zn-Ta coating was electrodeposited from an ionic liquid, and its properties were investigated through electrochemical experiments and characterization techniques. The results showed that a compositionally rich Zn-Ta coating could be obtained by electrodeposition under specific potential and temperature conditions, and it exhibited a certain corrosion current density.