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首页> 外文期刊>Journal of Materials Engineering and Performance >Electrochemical Behavior of Mg-Al-Zn-Ga Alloy as Anode Materials in 3.5?wt.% NaCl Solution
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Electrochemical Behavior of Mg-Al-Zn-Ga Alloy as Anode Materials in 3.5?wt.% NaCl Solution

机译：Mg-Al-Zn-Ga合金作为阳极材料的电化学行为为3.5〜wt。％NaCl溶液

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摘要

The microstructure and electrochemical behaviors of Mg-Al-Zn and Mg-Al-Zn-Ga alloys as anode materials were investigated by morphology observation, composition analysis, phase identification, and electrochemical tests. The experimental results suggest that Ga alloying can refine the grains of the Mg-Al-Zn alloy by promoting second-phase segregation, which comprises Mg~(17)Al~(12)and GaMg~(2). The comparison of discharge tests indicates that adding Ga to the Mg-Al-Zn alloy can negatively shift the discharge potential, provide a high current density, promote the formation of tiny and thin products, and improve the utilization efficiency. Meanwhile, the addition of Ga can increase the corrosion resistance of Mg-Al-Zn alloy because the Ga?alloying promotes the segregation of the intermetallic phases in the Mg matrix. The intermetallic phases disperse in isolate states in the Mg matrix, resulting in their falling off from the substrate once their adjacent Mg is exhausted and subsequently ceasing the micro-galvanic corrosion. The Mg-Al-Zn-Ga alloy with higher corrosion resistance performs better discharge activity than that of Mg-Al-Zn alloy in 3.5?wt.% NaCl solution, implying that the Mg-Al-Zn-Ga alloy is a promising anode material for seawater-activated battery.
机译：通过形态学观察，组成分析，相位鉴定和电化学测试研究了Mg-Al-Zn和Mg-Al-Zn-Ga合金作为阳极材料的微观结构和电化学行为。实验结果表明，Ga合金化可以通过促进第二相偏析来细化Mg-Al-Zn合金的晶粒，其包含Mg〜（17）Al〜（12）和GAMG〜（2）。放电测试的比较表明，向Mg-Al-Zn合金添加Ga可以对放电电位负面移动，提供高电流密度，促进微小产品的形成，提高利用效率。同时，由于Gaα合金化促进Mg基质中的金属间相的偏析，因此可以增加Mg-Al-Zn合金的耐腐蚀性。分散在Mg基质中的分离状态分散的金属间相，在其相邻的Mg被耗尽并随后停止微电常压腐蚀后，从基板中脱离它们。具有较高耐腐蚀性的Mg-Al-Zn-Ga合金比3.5〜wt.％NaCl溶液中的Mg-Al-Zn合金的耐腐蚀性更好。暗示Mg-Al-Zn-Ga合金是一个有前途的阳极海水激活电池的材料。

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