广西科学院学报2016，Vol.32Issue(3)：168-173,6.DOI:10.13657/j.cnki.gxkxyxb.20160826.004
镧含量对铝合金牺牲阳极海水综合电化学性能的影响
Effect of Lanthanum Content on the Comprehensive Electrochemical Performance of Aluminium Alloy Sac-rificial Anode in the Marine
摘要
Abstract
[Objective]Different content ratio of the rare earth La was added to analyze the electrochemical mechanism of the Al-Zn-In-Si based sacrificial alloy anode to get the La con-tent of sacrificial anode with the best electrochemical performance in the marine environ-ment.[Methods]The open circuit potential,working potential,dissolving morphology,current efficiency and polarization behavior of aluminium sacrificial anode containing La were tested by using of XRD analysis,polarization curves test,EIS test and constant current test in a sim-ulated marine environment.Additionally,the electrochemical mechanism of the anodes was also discussed.[Results]The existence form of solute elements in the aluminium sacrificial anodes was changed by adding La element that had different influence degree with different contents;the induction period and development period of pitting during the activation dissolution process of aluminium sacrificial anode with La were observed by EIS spectrums.Polarization curves showed that the corrosion potential of a-luminium sacrificial anode had become positive and the activity of decreases with excessive element La;the constant current test showed that the current efficiency of aluminium sacrificial anode had been improved after adding La.[Conclusion]The electrochemical performance of aluminium sacrificial anode are improved ef-fectively with proper addition of La element in seawater.The current efficiency of aluminium sacrificial anodes reach the peak while cotaining 0.2% La.关键词
电化学性能/镧含量/铝合金/牺牲阳极Key words
electrochemical performance/La content/Al alloy/sacrificial anode分类
矿业与冶金引用本文复制引用
刘欣,程坤,陈琴,陈清坤,李成栋,段继周,张杰..镧含量对铝合金牺牲阳极海水综合电化学性能的影响[J].广西科学院学报,2016,32(3):168-173,6.基金项目
海洋公益性行业科研专项经费项目(201405013-4)资助。 （201405013-4）
