Abstract
The present work investigates the electrodeposition of Zn and Zn–Co alloys from a sulphate bath on stainless steel substrate using cyclic voltammetry and transient current methods. Corrosion behaviour of Zn and Zn–Co alloy coatings in 3.5 wt-% NaCl solution was studied using potentiodynamic polarisation, open circuit potential, Tafel plots and electrochemical impedance spectroscopy. The results showed that the corrosion resistance of the deposits was highly influenced by the composition and morphology of the coatings. This resistance increases with the increase of the [Co2+]/[Zn2+] ratio in the solution.
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