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纯铅、纯锡电极在硫酸溶液中的电化学行为比较
武繁华，那鹏飞
（太原中北大学理学院化学系，山西太原030051）
摘要：采用循环伏安(CV)法、扫描电镜(SEM)法研究了纯铅、纯锡电极在硫酸溶液中的电化学行为。宽电位循环伏安法表明，纯锡电极上氧化还原峰电流远大于纯铝上的，随着循环次数的增加，纯铅电极上的氧化还原峰电流增大了，但纯锡电极上氧化还原峰电流随循环次数的增加变化不大；由负电位区循环伏安扫描可得，纯铅电极上氧化还原峰电流随循环次数的增加而减小，但纯锡电极上氧化还原峰电流却随循环次数的增大而增大；扫描电镜显示，纯铅和纯锡电极上
阳极腐蚀膜的形貌明显不同，且纯铅电极阳极膜比较紧密，而纯锡阳极膜比较疏松。关键词：纯铅；纯锡；铅酸蓄电池：电化学行为：腐蚀；阳极膜
中图分类号：TM912.1
文章编号：1006-0847(2012)02-51-05
文献标识码：A
Comparisonoftheelectrochemical behaviors onlead and
tininsulfuricacidsolution
WUFanhua,NAPengfei
(School of science,North University of China,Taiyuan Shanxi03005/,China
Abstract: The electrochemical behaviors of pure lead and tin in sulfuric solution were studied by using cyclic voltammetry (CV) and scanning electron microscopy. Results showed by CV, in a potential range between O V and 1.8 V limited by the evolution of hydrogen and oxygen respectively, that both currents of oxidation and rerduction peaks on lead electrode increased with the increase of cycle number, nevertheless the change of current on tin was not significant. The results of CV in a limited potential range between O V and 1.8 V revealed that the currents of oxidation and reduction peaks on lead electrode decreased with the increase of cycle number, but the current on tin increased. It was shown by SEM that the anodic films of lead and tin were rather different, the anodic film of lead was compact, but that of tin was loosen.
Key words: pure lead; pure tin; leadacid battery; electrochemical behavior; corrosion; anodic film
1前言
当前对锡的研究基本集中在板栅加锡对铅酸蓄电池性能的研究，且主要集中于三元、四元合金的
收稿日期：2011-09-29 万方数据
讨论-，而对铅锡二元合金的电化学行为及其腐蚀性能的研究却不多，由于不同元素在板栅合金中的协调作用，致使我们可能对元素本身影响的一些基本原理理解不多；为了更好地利用锡的有益作用，很有必要对其在硫酸溶液当中的一些基本机理进行深入探讨，从而对进一步研究其他元素起到指导作用。本实验采用宽电位循环伏安法、负电位循
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