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...
出处
《过程工程学报》
CAS
CSCD
北大核心
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)
