熔盐电渗法制备代汞 Zn-La 合金电极的可行性研究

Study on the feasibility of preparing Zn La alloy electrode substituting for mercury by molten salt electroosmosis

在ＮａＣｌ－ＡｌＣｌ３熔盐中，于无保护气氛条件下，用熔盐电渗法进行了锌表面渗镧，并用此技术制备了碱锰电池的代汞锌镧合金电极。ＧＩＴＴ曲线的测试结合相图及ＳＥＭ分析证明形成了五种锌镧合金。利用极化电阻的测定来检验锌合金在４０％ＫＯＨ溶液中的抗腐蚀性能，正交实验结果证明了镧是碱锰电池负极的良好代汞添加元素。

The lanthanum was interfused into zinc surface by electrolytic metallizing in NaCl AlCl 3 molten salt without protective atmosphere,and Zn La alloy electrode substituting for mercury of alkaline manganese dioxide battery was prepared.Five kinds of zinc alloys were formed,which could be determined by the measurement of GITT curves,phase diagram and the analysis of SEM.The corrosion resistant characteristics of alloy in 40%KOH solution was tested by polarization measurement.The results of orthogona lizing method showed that lanthanum was the good additive element of negative electrode of alkaline manganese dioxide battery.