Electrochemical properties of magnesium alloy anodes discharged in seawater  

镁合金阳极材料在海水中放电的电化学性能(英文)

作　　者：余琨[1] 黄俏[1] 赵俊[1] 戴翌龙[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第9期2184-2190,共7页中国有色金属学报（英文版）

基　　金：Project (2011BAE22B03) supported by National Key Technologies R&D Program of China;Project (2011DFA50906) supported by the International S&T Cooperation Program of China

摘　　要：Magnesium alloys can be developed as anode materials for seawater activated batteries. The electrochemical properties of AZ31, AP65 and Mg-3%Ga-2%Hg alloy anodes discharged in seawater were studied. The potentiodynamic polarization shows that the Mg-3%Ga-2%Hg alloy provides more negative corrosion potentials than AZ31 or AP65 alloy. The galvanostatic discharge results show that the Mg-3%Ga-2%Hg alloy exhibits good electrochemical properties as anodes in seawater. And the EIS studies reveal that the magnesium alloy anode/seawater interfacial process is determined by an activation controlled reaction. The Mg3Hg and Mg21Ga5Hg3 phases in Mg-3%Ga-2%Hg alloy improve its electrochemical properties better than the Mg17（Al,Zn）12 phase in AZ31 and Mg（Pb） solid solution phase in AP65 alloys.镁合金可以作为海水激活电池阳极材料来使用。研究了AZ31、AP65和Mg-3%Ga-2%Hg 3种镁合金在海水中放电的电化学性能。Mg-3%Ga-2%Hg合金的阳极极化曲线表明,该合金具有比AZ31和AP65合金更负的腐蚀电位。恒电流放电实验结果表明,Mg-3%Ga-2%Hg合金在海水中表现出更好的阳极放电性能。交流阻抗测试表明,镁合金阳极和海水接触表面的电化学反应决定反应的活性,Mg-3%Ga-2%Hg 合金中的Mg3Hg和Mg21Ga5Hg3化合物比AZ31合金中的Mg17(Al,Zn)12相以及AP65合金中的铅在镁中形成的固溶体具有更好的电化学活性。

关 键 词：magnesium alloy Mg-Ga-Hg alloy electrochemical properties seawater activated battery ANODE 

分 类 号：O646[理学—物理化学]