栅栏型铝基铅合金复合阳极板在电解锌中的应用

Application of Fence Type Aluminum-based Lead Alloy Composite Anode Plate in Zinc Electrolysis

采用连续挤压拉拔技术在铝芯上包覆铅合金制备了一种铝棒铅合金复合阳极。通过万能试验机、低电阻测试仪、电子密度计及电化学强化腐蚀研究了该阳极的抗拉强度、导电性、密度和腐蚀速率,并组装成栅栏型铝基铅合金复合阳极板用于电解锌。结果表明:对比轧制Pb-0.06%Ca-0.3%Ag合金阳极,铝基Pb-0.06%Ca-0.3%Ag复合阳极的抗拉强度提高8.07%,延伸率降低10.7%,导电性提高3.39倍,质量相对减轻22.83%,腐蚀速率降低28.4%;在电解锌过程中,槽电压降低40mV,电流效率提高2.97%,能耗降低3.08%。栅栏型铝基铅合金复合阳极质量轻,导电性好,耐腐蚀,有较广泛的开发应用前景。

An aluminum rod lead alloy anode was prepared by coating lead alloy on aluminum core by continuous extrusion-drawing technique.The tensile strength,electrical conductivity,density and corrosion rate of the anode were studied by universal testing machine,low resistance tester,electronic density meter and electrochemical accelerated corrosion test,and assembled into a fence type aluminum-based lead alloy anode plate for zinc electrolysis industry test.The results show that compared with the rolled Pb-0.06%Ca-0.3%Ag alloy anode,the Al-based Pb-0.06%Ca-0.3%Ag composite anode has better performances,the tensile strength increases by 8.07%,the elongation reduces by 10.7%,and the conductivity improves by 3.39times,and the weight reduces by 22.83%,as well as the corrosion rate reduces by 28.4%.Further,the cell voltage reduces by 40mV,the current efficiency improves by 2.97%,and the energy consumption reduces by 3.08%during zinc electrolysis.Therefore,the fence type aluminum-based lead alloy composite electrode has light weight,good conductivity and corrosion resistance,and has important prospects of exploitation and utilization.