Pb-Co阳极在含氯硫酸电解液中的电化学行为  

Electrochemical Behavior of Pb-Co Anodes in Sulfuric Acid Electrolyte Containing Cl^(−)Ions

作　　者：王帅 刘颖 徐东 林文军 王勇 赵烁 杨娟 周向阳 Wang Shuai;Liu Ying;Xu Dong;Lin Wenjun;Wang Yong;Zhao Shuo;Yang Juan;Zhou Xiangyang(School of Materials Science and Engineering,Hebei University of Engineering,Handan 056038,China;Zhuzhou Smelting Group Co.,Ltd,Zhuzhou 412000,China;School of Metallurgy and Environment,Central South University,Changsha 410083,China)

机构地区：[1]河北工程大学材料科学与工程学院,河北邯郸056038 [2]株洲冶炼集团有限公司,湖南株洲412000 [3]中南大学冶金与环境学院,湖南长沙410083

出　　处：《稀有金属材料与工程》2023年第5期1565-1572,共8页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51904085,51904086,U20A20272);Supported by Zhuzhou Smelting Group Co.,Ltd(ZYKJ20220408003);Natural Science Foundation of Hebei Province(E2021402056);Science and Technology Research and Development Program of Handan City(21422101235)。

摘　　要：采用粉末冶金法制备了不同Co含量(0.5%,1.0%,2.0%,质量分数)的Pb-Co阳极,并与传统的Pb-Ca-Sn阳极进行了对比试验。通过电化学测试研究了阳极在160 g/L H_(2)SO_(4)、500 mg/L Cl^(-)电解液中的电化学行为,研究了恒电流极化72 h后阳极氧化层的物相组成、表面形貌和元素分布。随着Co含量的增加,Pb-Co阳极的电位、电荷传递电阻和析氧过电位逐渐降低。恒电流极化72 h后,Pb-2%Co阳极的析氧过电位比Pb-Ca-Sn阳极低101 mV。此外,在Cl^(-)的存在下,电荷传递得到改善,析氧反应受到抑制,阳极氧化层恶化。Pb-Co anodes with different Co contents(0.5wt%,1wt%,and 2wt%)were prepared by powder metallurgy,and the traditional Pb-Ca-Sn anode was used as the reference for comparison.The electrochemical behavior of the anodes in the electrolyte containing 160 g/L H_(2)SO_(4) and 500 mg/L Cl^(−) ions was evaluated by electrochemical measurements.The phase composition,surface morphologies,and element distribution of the anodic oxide layers after galvanostatic polarization for 72 h were investigated.With increasing the Co content,the anodic potential,charge transfer resistance,and oxygen evolution overpotential of the Pb-Co anodes are decreased gradually.After galvanostatic polarization for 72 h,the oxygen evolution overpotential of Pb-2wt%Co anode is lower than that of Pb-Ca-Sn anode by 101 mV.In addition,due to the presence of Cl^(−)ions,the charge transfer is improved,the oxygen evolution reaction is inhibited,and the oxide layer is deteriorated.

关 键 词：铜电积 Pb-Co阳极 析氧反应 耐腐蚀性能 氯离子 

分 类 号：TF811[冶金工程—有色金属冶金]