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电沉积Al/Pb-Ag阳极在电积锌过程中的耐腐蚀性

张永春1,陈步明1,郭忠诚1,2*,刘建华1   

  1. (1.昆明理工大学冶金与能源学院 昆明 650093；2.昆明理工恒达科技有限公司 昆明 650106)
  • 收稿日期:2012-06-14 修回日期:2012-09-21 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 郭忠诚，教授; Tel:0871-8352598; Fax:0871-8352599; E-mail:guozhch@vip.163.com; 研究方向：惰性阳极材料
  • 基金资助:
    国家自然科学基金(51004056)资助项目

Corrosion Resistance of Electrodeposited Al/Pb-Ag Anode During Zinc Electrowinning

ZHANG Yongchun1, CHEN Buming1, GUO Zhongcheng1,2*, LIU Jianhua1   

  1. (1.Department of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;
    2.Kunming Hendera of Science and Technology Co. Ltd,Kunming 650106,China)
  • Received:2012-06-14 Revised:2012-09-21 Published:2013-04-10 Online:2013-04-10

PDF

1807

被引次数

17 | 8

摘要： 采用电沉积的方法在甲基磺酸镀液中制备了一种新型的锌电积Al/Pb-0.23%Ag阳极。 腐蚀实验和电化学分析显示，Al/Pb-0.23％Ag阳极与传统Pb-0.25％Ag阳极相比，具有较低的腐蚀速率，较高的腐蚀电位和较低的腐蚀电流密度，较高的电催化活性；金相显微镜、扫描电子显微镜和X射线衍射分析显示，Al/Pb-0.23％Ag阳极的晶粒细小、致密，极化48 h后有PbSO4、α-PbO2和β-PbO2生成。

关键词: Al/Pb-0.23％Ag阳极, 耐腐蚀性, 电积锌, 析氧电位

Abstract: A new anode of Al/Pb-0.23％Ag was prepared from methanesulfonic acid bath by electrodeposition for zinc electrowinning. The results of corrosion test and electrochemical analysis show that the Al/Pb-0.23％Ag anode has a lower corrosion rate, higher corrosion potential and lower corrosion current density, higher electrocatalytic activity as compared to conventional Pb-0.25％Ag anode. The metallographic structure and scanning electron microscopy(SEM) observations show that the Al/Pb-0.23％Ag anode has tiny and dense crystals. X-ray diffraction(XRD) analysis shows that the Al/Pb-0.23％Ag anode has the phase of PbSO4, α-PbO2 and β-PbO2 after 48 h of anodic polarization.

Key words: Al/Pb-0.23％Ag anode, corrosion resistance, zinc electrowinning, oxygen evolution reaction potential

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