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Effects of Ga and Sn on the electrochemical behavior of Mg–6Al–1Zn as anode materials
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-02-26 , DOI: 10.1002/maco.202011507 Xiaofeng Wan 1 , Wei Chen 1 , Jingling Zhou 1 , Hua Zhang 1 , Fubao Zhang 1 , Kequan Wei 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-02-26 , DOI: 10.1002/maco.202011507 Xiaofeng Wan 1 , Wei Chen 1 , Jingling Zhou 1 , Hua Zhang 1 , Fubao Zhang 1 , Kequan Wei 1
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The microstructure and electrochemical behavior of Mg–6Al–1Zn, Mg–6Al–1Zn–1Ga, Mg–6Al–1Zn–1Sn, and Mg–6Al–1Zn–0.5Sn–0.5Ga as anode materials in a 3.5 wt% NaCl solution are compared systematically. The results show that Sn alloying refines the second‐phases of Mg–6Zn–1Al by promoting tiny granular Mg17Al12 phases containing Sn, and inspires their disperse distribution. However, the Ga results in the formation of semicontinuous reticular Ga containing Mg17Al12 phases. The comparison of discharge tests indicates that Mg–6Al–1Zn–1Sn has the highest discharge activity, and Mg–6Al–1Zn–1Ga displays the largest hydrogen evolution corrosion resistance in 3.5 wt% NaCl solution at 298 K. The synergy of Ga and Sn can shorten discharge activation time and promote low discharge potential. In addition, the utilization efficiencies of the alloys decrease as follows: Mg–6Al–1Zn–1Ga > Mg–6Al–1Zn–0.5Sn–0.5Ga > Mg–6Al–1Zn–1Sn > Mg–6Zn–1Al. This study illustrates that the Mg–6Al–1Zn–0.5Sn–0.5Ga alloy has acceptable utilization efficiency and desirable electrochemical activity, which implies that doping Ga and Sn obtains a balance between discharge activity and utilization efficiencies.
中文翻译：
镓和锡对作为阳极材料的Mg-6Al-1Zn电化学行为的影响
Mg-6Al-1Zn，Mg-6Al-1Zn-1Ga，Mg-6Al-1Zn-1Sn和Mg-6Al-1Zn-0.5Sn-0.5Ga的微观结构和电化学行为在3.5 wt％NaCl溶液中进行系统比较。结果表明，锡合金化通过促进含有Sn的微小颗粒Mg 17 Al 12相来细化Mg-6Zn-1Al的第二相，并激发其分散分布。然而，Ga导致形成含有Mg 17 Al 12的半连续网状Ga阶段。放电测试的比较表明，Mg-6Al-1Zn-1Sn具有最高的放电活性，而Mg-6Al-1Zn-1Ga在298 K的3.5 wt％NaCl溶液中表现出最大的耐氢腐蚀性能。 Sn可以缩短放电激活时间并促进低放电电位。此外，合金的利用效率降低如下：Mg-6Al-1Zn-1Ga> Mg-6Al-1Zn-1.0.5Sn-0.5Ga> Mg-6Al-1Zn-1Sn> Mg-6Zn-1Al。这项研究表明，Mg-6Al-1Zn-0.5Sn-0.5Ga合金具有可接受的利用效率和理想的电化学活性，这意味着掺杂Ga和Sn可以获得放电活性和利用效率之间的平衡。
更新日期：2020-02-26
中文翻译：
镓和锡对作为阳极材料的Mg-6Al-1Zn电化学行为的影响
Mg-6Al-1Zn，Mg-6Al-1Zn-1Ga，Mg-6Al-1Zn-1Sn和Mg-6Al-1Zn-0.5Sn-0.5Ga的微观结构和电化学行为在3.5 wt％NaCl溶液中进行系统比较。结果表明，锡合金化通过促进含有Sn的微小颗粒Mg 17 Al 12相来细化Mg-6Zn-1Al的第二相，并激发其分散分布。然而，Ga导致形成含有Mg 17 Al 12的半连续网状Ga阶段。放电测试的比较表明，Mg-6Al-1Zn-1Sn具有最高的放电活性，而Mg-6Al-1Zn-1Ga在298 K的3.5 wt％NaCl溶液中表现出最大的耐氢腐蚀性能。 Sn可以缩短放电激活时间并促进低放电电位。此外，合金的利用效率降低如下：Mg-6Al-1Zn-1Ga> Mg-6Al-1Zn-1.0.5Sn-0.5Ga> Mg-6Al-1Zn-1Sn> Mg-6Zn-1Al。这项研究表明，Mg-6Al-1Zn-0.5Sn-0.5Ga合金具有可接受的利用效率和理想的电化学活性，这意味着掺杂Ga和Sn可以获得放电活性和利用效率之间的平衡。
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