锌电积用Pb-Ag-Bi阳极的电化学行为  

Electrochemical Behavior of Pb-Ag-Bi Alloys as Anode in Zinc Electrowinning

作　　者：衷水平[1] 赖延清[1] 蒋良兴[1] 田忠良[1] 李劼[1] 刘业翔[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《过程工程学报》2008年第S1期289-293,共5页The Chinese Journal of Process Engineering

基　　金：湖南省院士基金(编号:06FJ4059)

摘　　要：制备了一种新型的锌电积用阳极Pb-Ag(0.8%,ω)-Bi(0～5.0%,ω),测试了该三元合金的电化学性能并与工业用Pb-Ag(0.8%,ω)阳极进行了对比.结果表明,阳极过电位随着合金中Bi含量的提高而降低,当Bi含量为1.0%(ω)和5.0%(ω)时,其阳极过电位比Pb-Ag(0.8%,ω)阳极分别低了40～50 mV和60～80 mV.用LSV法检测了阳极表面氧化膜的形成过程,并用XRD和SEM技术分析了膜的成分和形貌.2种阳极的表面氧化膜都主要由α-PbO_2和β-PbO_2组成,但具有不同的结构.与Pb-Ag(0.8%,ω)阳极相比,Pb-Ag(0.8%,ω)-Bi(1.0%,ω)阳极的表面膜结构更加规则、细致,但Pb-Ag(0.8%,ω)-Bi(3.0%,ω)阳极的表面膜又表现出与基体结合不紧密,呈疏松碎片状结构的特点.A new type of Pb-Ag(0.8%,ω)-Bi(0～5.0%,ω)alloy used as anode in electrowinning of zinc fi om sulphuric acid electrolytes was prepared.The electrochemical properties of this ternary lead alloy were tested and compared with those of Pb-Ag(0.8%,w)anode used in industry.The results showed that the anodic overpotential decreased with increasing of Bi content in the alloy.When the content of Bi was 1.0%(ω)and 5.0%(ω),the anodic overpotential was about 40～50 mV and 60～80 mV,being lower than that of Pb-Ag(0.8%,ω) al...

关 键 词：锌电积 阳极过电位 Pb-Ag-Bi阳极 

分 类 号：TF813[冶金工程—有色金属冶金]