Electrochemical characterization of the corrosion of a Mg-Li Alloy
Electrochemical characterization of the corrosion of a Mg-Li Alloy
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DOI：
10.1016/j.matlet.2007.11.044
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发表时间：
2008-05
影响因子：
3
通讯作者：
Chunhong Zhang;Xiaomei Huang;Milin Zhang;Lili Gao;Reizhi Wu
中科院分区：
文献类型：
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作者：
Chunhong Zhang;Xiaomei Huang;Milin Zhang;Lili Gao;Reizhi Wu
采用开路电位-时间曲线、动电位极化曲线和交流阻抗谱等电化学方法研究了新型稀土镁锂合金在碱性氯化钠溶液中的腐蚀行为。结果表明，Cl-−浓度和pH值对镁锂合金的腐蚀有一定的影响，在较高的Cl-−浓度下，Cl-−浓度是影响腐蚀的主要因素。合金在强碱性溶液中腐蚀较轻，腐蚀电流(Icorr)减小，腐蚀电位(Ecorr)转向正向，电容环增大。随着Cl-−浓度的增加，Icorr增大，电容环缩小，这意味着合金的腐蚀程度随Cl-−浓度的增加而加剧。
The corrosion characteristic of a novel Mg–Li alloy with RE in alkaline NaCl solution was investigated by electrochemical means, such as open circuit potential vs time curves, potentiodynamic polarization curves and electrochemical impedance spectroscopy(EIS). The result showed that Cl−concentration and pH value affected the corrosion of Mg–Li alloy, and in high Cl−concentration solution Cl−concentration was the major factor. Corrosion of the alloy was slighter in the stronger alkaline solution, because corrosion current(Icorr) reduced, corrosion potential (Ecorr) turned to positive direction and the capacitive loops enlarged. When Cl−increased, Icorrincreased and capacitive loops shrinked, this means that corrosion of the alloy was more serious with the increase in Cl−concentration.