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研究在电位衰变期间在酸性硫酸锌电解液中,MnO4-和银的含量对5个通用铅银合金阳极电化学行为的影响。当阳极浸入不含MnO4-的酸性硫酸锌电解液中时,通过开路电位测定,发现Pb-0.72%Ag进入完全钝化状态所用的时间最短,紧接着的是阳极Pb-0.67%Ag、Pb-0.60%Ag、Pb-0.58%Ag和Pb-0.29%Ag-0.1%Ca。在5h的浸入期间,MnO4-离子能加速钝化和增加阳极的腐蚀电流密度。通过交流阻抗法测定,发现在含有MnO4的电解液中,阳极Pb-0.72%Ag具有最好的耐蚀性,紧接着的是阳极Pb-0.67%Ag、Pb-0.60%Ag,然后是阳极Pb-0.58%Ag和Pb-0.29%Ag-0.1%Ca。
The effect of MnO4- and silver content on the electrochemical behavior of five common lead-silver alloy anodes in acidic zinc sulfate electrolyte during potential decay was investigated. When the anode was immersed in an acidic zinc sulfate electrolyte containing no MnO4-, the time taken for the Pb-0.72% Ag to enter the fully passivated state was found to be the shortest by the open circuit potential measurement, followed by the anode Pb-0.67% Ag, Pb- 0.60% Ag, Pb-0.58% Ag and Pb-0.29% Ag-0.1% Ca. During the 5h immersion, MnO4- ions accelerate the passivation and increase the corrosion current density of the anode. As measured by AC impedance method, it was found that the anode Pb-0.72% Ag had the best corrosion resistance in the electrolyte containing MnO4, followed by the anode Pb-0.67% Ag, Pb-0.60% Ag and then the anode Pb -0.58% Ag and Pb-0.29% Ag-0.1% Ca.