| 引用本文： |
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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. [点击复制]
- LIU Xin,CHENG Kun,CHEN Qin,CHEN Qingkun,LI Chengdong,DUAN Jizhou,ZHANG Jie.Effect of Lanthanum Content on the Comprehensive Electrochemical Performance of Aluminium Alloy Sacrificial Anode in the Marine[J].Journal of Guangxi Academy of Sciences,2016,32(3):168-173. [点击复制]
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| 摘要: |
| [目的]分析Al-Zn-In-Si系牺牲阳极添加不同含量配比的稀土元素镧(La)时,其电化学性能的作用规律,获得在海水环境下最佳牺牲阳极电化学性能的La添加量。[方法]通过模拟海洋环境,采用XRD分析、极化曲线、交流阻抗(EIS)和恒电流加速试验等方法,研究含La铝合金牺牲阳极的开路电位、工作电位、溶解形貌、电流效率以及极化等行为及其发生机理。[结果]La的加入改变了铝合金牺牲阳极溶质元素的存在形式,并随着含量的变化对其产生不同程度的影响;EIS谱表明含La铝合金牺牲阳极活化溶解过程体现了点蚀诱导期和发展期,极化曲线表明加入过量La后铝合金牺牲阳极的腐蚀电位变正,活化性能变差;恒电流测试实验表明加入La后铝合金牺牲阳极的电流效率有所升高。[结论]适量添加稀土元素La可有效改善铝合金牺牲阳极在海水中的电化学性能,其中La含量为0.2%的铝合金牺牲阳极电流效率最高。 |
| 关键词: 电化学性能 镧含量 铝合金 牺牲阳极 |
| DOI：10.13657/j.cnki.gxkxyxb.20160826.004 |
| 投稿时间：2016-04-10 |
| 基金项目:海洋公益性行业科研专项经费项目(201405013-4)资助。 |
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| Effect of Lanthanum Content on the Comprehensive Electrochemical Performance of Aluminium Alloy Sacrificial Anode in the Marine |
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LIU Xin1, CHENG Kun1, CHEN Qin1, CHEN Qingkun1, LI Chengdong1, DUAN Jizhou2, ZHANG Jie2
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| (1.Qingdao University of Science and Technology, Qingdao, Shandong, 266042, China;2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China) |
| 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 content of sacrificial anode with the best electrochemical performance in the marine environment.[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 simulated 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 aluminium 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 effectively with proper addition of La element in seawater. The current efficiency of aluminium sacrificial anodes reach the peak while cotaining 0.2% La. |
| Key words: electrochemical performance La content Al alloy sacrificial anode |
