Abstract
The influence of silver, in the range of 0.02 wt% to 0.07 wt%, on the electrochemical and corrosion properties of Pb–Ca–Sn–Al grid alloy in sulphuric acid solutions at room temperature was investigated by potentiodynamic and potentiostatic methods. The introduction of Ag into a common grid alloy of Pb–Ca–Sn–Al confers some important features on the alloy. Potentiodynamic anodic polarisation measurements provided a qualitative overview of the activating, passivating and transpassivating processes which correspond to Pb → PbSO4, PbSO4 → PbO2 reactions respectively. Cyclic voltammetric measurements provided information on the effect of Ag on the oxidation of PbSO4 to PbO2. The addition of Ag refined the grains and enhanced the passivation of the electrode and its corrosion resistance. A decrease in the oxygen evolution overpotential and an increase in the hydrogen evolution overpotential with the additions of Ag were also observed during the experiments.
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Zhong, S., Wang, J., Liu, H.K. et al. Influence of silver on electrochemical and corrosion behaviours of Pb–Ca–Sn–Al grid alloys Part I: Potentiodynamic and potentiostatic studies. Journal of Applied Electrochemistry 29, 1–6 (1999). https://doi.org/10.1023/A:1003492329927
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DOI: https://doi.org/10.1023/A:1003492329927