All electrochemical experiments were performed in a standard
one-compartment three-electrode cell. The reference electrode
was Ag/AgCl (3 M, KCl) and the counter electrode was a platinum
sheet with surface area of 0.36 cm2. In this study, all electrode
potential values were referred to this reference electrode. The
working electrode used in this study was carbon steel with the composition:
0.0561% C, 0.4498% Mn, 0.0103% P, 0.0036% S, 0.14085
Si and 99.3394% Fe. The surface of this electrode was carefully
polished with abrasive paper (1200 grid), degreased with 1/1
ethanol/acetone mixture, washed with distilled water and dried.
CHI 606C and CHI 660B model digital electrochemical analysers
were used for all electrochemical measurements. Zinc–cobalt plating
(CS/ZnCo) was carried out in a bath including by weight 42.75%
zinc sulphate (ZnSO4), 8.22% cobalt sulphate (CoSO4), 11.64%
sodium citrate (Na3C6H5O), 13.26% boric acid (H3BO3), 23.87%
ammonium chloride (NH4Cl) and 0.27% sodium sulphate (Na2SO4).
Meanwhile pH was approximately 5.0. The thickness of alloy
All electrochemical experiments were performed in a standardone-compartment three-electrode cell. The reference electrodewas Ag/AgCl (3 M, KCl) and the counter electrode was a platinumsheet with surface area of 0.36 cm2. In this study, all electrodepotential values were referred to this reference electrode. Theworking electrode used in this study was carbon steel with the composition:0.0561% C, 0.4498% Mn, 0.0103% P, 0.0036% S, 0.14085Si and 99.3394% Fe. The surface of this electrode was carefullypolished with abrasive paper (1200 grid), degreased with 1/1ethanol/acetone mixture, washed with distilled water and dried.CHI 606C and CHI 660B model digital electrochemical analyserswere used for all electrochemical measurements. Zinc–cobalt plating(CS/ZnCo) was carried out in a bath including by weight 42.75%zinc sulphate (ZnSO4), 8.22% cobalt sulphate (CoSO4), 11.64%sodium citrate (Na3C6H5O), 13.26% boric acid (H3BO3), 23.87%ammonium chloride (NH4Cl) and 0.27% sodium sulphate (Na2SO4).Meanwhile pH was approximately 5.0. The thickness of alloy
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