Fabrication and anodic polarization behavior of lead-based porous anodes in zinc electrowinning

来源期刊：中南大学学报(英文版)2008年第6期

论文作者：衷水平 赖延清 蒋良兴 吕晓军 陈佩如 李劼 刘业翔

文章页码：757 - 762

Key words：zinc electrowinning; negative pressure infiltration; porous anode; anode potential; corrosion rate

Abstract: A new type of lead-based porous anode in zinc electrowinning was prepared by negative pressure infiltration. The anodic polarization potential and corrosion rate were studied and compared with those of traditional flat anodes (Pb-0.8%Ag) used in industry. The anode corrosion rate was determined by anode actual current density and microstructure. The results show that the anodic oxygen evolution potential decreases first and then increases with the decrease of pore diameter. The anodic potential decreases to the lowest value of 1.729 V at the pore diameter of 1.25-1.60 mm. The porous anode can decrease its actual current density and thus decrease the anodic corrosion rate. When the pore diameter is 1.60-2.00 mm, the anodic relative corrosion rate reaches the lowest value of 52.1%.

基金信息：the Science and Technology Research Project of Hunan Province, China