锌电沉积用Al/Pb-Ag-Sn阳极的电化学性能研究  

Electrochemical performances of Al/Pb-Ag-Sn anode for zinc electrowinning

作　　者：周松兵[1] 陈步明[1,2] 郭忠诚[1,2] 徐瑞东[1] 张永春[1] 杨海涛[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明理工恒达科技有限公司,昆明650106

出　　处：《材料科学与工艺》2015年第1期108-114,共7页Materials Science and Technology

基　　金：国家自然科学基金资助项目(51004056);云南省应用基础研究基金项目(2010ZC052);高等学校博士学科点专项科研基金(2012314-110011);中国科学院无机涂层材料重点实验室开发基金资助项目(KKZ6201152009);云南省应用基础研究计划重点项目(2014FA024)

摘　　要：采用电沉积的方法在铝基体表面制备Pb-0.8%Ag-0.1%Sn复合阳极材料,并应用于电解锌中.研究了电沉积Pb-0.8%Ag-0.1%Sn复合阳极材料和电沉积Pb-0.8%Ag阳极材料及铸造Pb-0.8%Ag阳极材料在Zn SO4-H2SO4体系下极化24 h后的电化学性能,同时利用X射线衍射仪和扫描电镜分别分析三种阳极材料的相组成及观察三种阳极材料的微观形貌.结果显示:电沉积Pb-0.8%Ag-0.1%Sn复合阳极材料电催化性能和耐腐蚀性能比电沉积Pb-0.8%Ag复合阳极材料及铸造Pb-0.8%Ag阳极材料好.X-射线衍射图显示,对应的Pb-0.8%Ag-0.1%Sn阳极表面上β-Pb O2(101)和Pb Ox(1<x<2)(122)的衍射峰强度最强,说明Pb-0.8%Ag-0.1%Sn阳极表面的导电性优于另外两种阳极.扫描电镜图像显示Pb-0.8%Ag-0.1%Sn复合阳极材料表面形貌更加致密均匀.Pb-0. 8%Ag-0. 1%Sn composite anode was prepared on the surface of aluminum substrate by the electrodeposition and applied to the zinc electrowinning. The electrochemical performance of the electrodeposition Pb-0.8%Ag-0.1%Sn composite anode was studied in zinc sulfate?sulfuric acid solution after a day polarization, which were compared with electrodeposition Pb-0.8%Ag anode and casting Pb-0.8%Ag anode. Meanwhile, the microstructure of three kinds anodes was observed by SEM and the phases were analyzed by X?ray diffractometry. The results indicated that the electrocatalytic activity and corrosion resistance of the electrodeposition Pb-0.8%Ag-0.1%Sn anode were better than those of other anodes. The X?ray diffraction indicated that the diffraction peaks of β?PbO2 ( 101 ) and PbOx ( 1 <x < 2 ) ( 122 ) which formed on the electrodeposition Pb-0.8%Ag-0.1%Sn anode were stronger than those on the other anodes. The conductivity of the electrodeposition Pb-0.8%Ag-0.1%Sn anode was better than others. The photo of the canning electron microsscope indicated that the surface of the electrodeposition Pb-0.8%Ag-0.1%Sn anode was more uniform and compact.

关 键 词：电沉积 铅银锡阳极 铅银阳极 耐腐性 电化学性能 

分 类 号：TQ153[化学工程—电化学工业]