Abstract
Zinc–manganese–tin (Zn–Mn–Sn) ternary alloys have been successfully prepared, for the first time, by electrochemical deposition from a choline chloride-based ionic liquid. The influence of electrolyte composition and electrodeposition potential on the ternary Zn–Mn–Sn alloy surface morphology, composition and corrosion resistance were investigated and contrasted with the characteristics of binary Zn–Mn and Zn–Sn electrodeposits. It was found that the composition of the plating bath and deposition potential have a significant influence on the alloy content, morphology and corrosion properties of the Zn–Mn–Sn alloys. The content of Sn in the ternary alloy increased with a decrease in electrodeposition potential and an increase in concentration of Sn2+ in the electrolyte. The corrosion studies showed that the Zn–Mn–Sn alloys have a synergistic property combining the barrier behaviour afforded by Sn and the strong passive behaviour of Mn, while the sacrificial characteristics are still preserved.
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