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将H_3PO_4加入H_2SO_4溶液有助于降低铅酸电池深放电后的硫化作用。研究Pb和Pb-In合金在纯H_3PO_4和含不同浓度H_3PO_4的H_2SO_4溶液中的阳极行为。使用动电位法、恒电位法和循环伏安法进行电化学测试。通过X射线衍射(XRD)、X射线能谱分析(EDX)和扫描电镜(SEM)对Pb和Pb-In合金表面钝化膜的成分和形貌进行表征。动电位研究表明测试溶液中的钝化电流密度随合金中In含量的增加而增加。向电解液中添加0.1 mol/L H_3PO_4对减小In含量更高(10%和15%)的合金表面的钝化膜厚度更有效。XRD、EDX和SEM数据表明在混合溶液中,PbSO_4和PbO在合金表面的生成随合金中In含量的增加而减弱,且当In含量更高时(15%)完全停止。
Adding H_3PO_4 to H_2SO_4 solution can help reduce the vulcanization of lead-acid batteries after deep discharge. The anode behavior of Pb and Pb-In alloys in pure H_3PO_4 and H_2SO_4 solutions with different concentrations of H_3PO_4 was studied. Electrochemical tests were performed using potentiodynamic, potentiostatic and cyclic voltammetry. The composition and morphology of passivation films on Pb and Pb-In alloys were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM) Potentiodynamic studies show that the passivation current density in the test solution increases with increasing In content in the alloy. Addition of 0.1 mol / L H 3 PO 4 to the electrolyte was more effective in reducing the passivation film thickness on the alloy surface with higher In contents (10% and 15%). The results of XRD, EDX and SEM show that the formation of PbSO 4 and PbO on the alloy surface decreases with the increase of In content in the alloy in the mixed solution and stops completely when the In content is higher (15%).