Al/Pb/α-PbO_2惰性阳极材料制备及电化学性能  

Preparation and Electrochemical Performance of Al/Pb/α-PbO_2 Inert Anodes

作　　者：关永永[1,2] 徐瑞东[1,2] 黄利平[3] 孔营[1,2] 陈步明[1,2] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]云南省复杂有色金属资源清洁利用国家重点实验室(培育),昆明650093 [3]中国科学院特种无机涂层重点实验室,上海200050

出　　处：《材料工程》2013年第2期87-92,共6页Journal of Materials Engineering

基　　金：中国科学院特种无机涂层重点实验室开放基金(KKZ6201152009);国家自然科学基金(51004056);昆明理工大学分析测试基金(2011239)

摘　　要：采用单脉冲电沉积在铝合金基体表面制备了锌电积用Al/Pb/α-PbO2惰性阳极材料,研究了电沉积过程脉冲平均电流密度(2～5A.dm-2)对制备的惰性阳极材料在50g.L-1 Zn2+,150g.L-1 H2SO4,35℃溶液中电化学性能的影响,测试了阳极极化、循环伏安和塔菲尔曲线。结果表明:增加脉冲平均电流密度,惰性阳极材料在[ZnSO4+H2SO4]溶液中同一测试电流密度下的析氧电位或析氧过电位逐渐升高。相比于Pb-1%Ag合金阳极脉冲平均电流密度为2A.dm-2时制备的惰性阳极材料在[ZnSO4+H2SO4]溶液中的析氧过电位较低,腐蚀电位较高,腐蚀电流较低。A1/Pb/α-PbO_2 inert anodes used in zinc electrowinning were prepared on the surface of alu- minum alloy substrates by means of single-pulse electrodeposition, the influences of pulse average cur- rent densities from 2A·dm^-2 to 5A·dm ^-2 on the electrochemical properties of the composite inert an- odes in a synthetic zinc electrowinning electrolyte of 50g ·L ^-1 Zn^2＋ , 150g ·L^-1 H2SO4 and 35℃, were researched, and the anodic polarization, cyclic voltammetry and Tafel polarization curves were meas- ured. The results show that in [ZnSO4＋H2SO4] electrolytes and at the same testing current density, oxygen evolution potential or overpotential of oxygen evolution of composite inert anodes gradually in- crease with the rise of pulse average current densities from an original plating bath. The inert anode prepared at 2A · dm^-2 , possessess lower oxygen evolution overpotential, higher corrosion potential and lower corrosion current than those of Pb-1%Ag alloy anode.

关 键 词：单脉冲 电沉积 电流密度 惰性阳极材料 α-PbO_2 

分 类 号：TM241[一般工业技术—材料科学与工程]