贫液式铅酸蓄电池负极极耳和汇流排腐蚀机理研究

Corrosion study of negative plate lugs and straps in VRLA batteries

用浓度均为0.1M的硫酸和硫酸钠溶液分别模拟贫液式铅酸蓄电池负极极耳和汇流排暴露在空气中,即被电解液部分润湿和未完全润湿部位,用循环伏安法研究这两种电解液中Pb-Ca-Sn-Al合金和纯Pb电极的电化学性质和不同气体环境对负极极耳和汇流排腐蚀的影响。实验发现电极表面的电解液为弱碱性溶液时,电极腐蚀速度比硫酸溶液中明显加大。同时,在碱液中Pb-Ca-Sn-Al合金的腐蚀速度比纯Pb大。在两种溶液中,氧气明显促进了腐蚀过程。

The electrochemical behaviors of Pb-Ca-Sn-Al and pure Pb electrodes in 0.1M H2SO4 and 0.1M Na2SO4 solutions in both N2 and O2 atmosphere were studied respectively. The two electrolytes were used to simulate the circumstance of the electrolyte moistened and untouched part of the top lead, viz, the connecting strap and lugs of negative plates exposed in the air. The cyclic voltammetry was employed to investigate the influences of the electrolyte and gas atmosphere on the Pb-Ca-Sn-Al and pure Pb electrodes. It...