Mg-8Li合金的制备与制氢性能研究

在真空熔炼炉中制备了Mg-8Li二元合金,并研究了该合金在不同大气状态下的腐蚀情况以及温度和Cl-含量对水解制氢性能的影响。结果表明,相比于自然状况的大气条件下,Mg-8Li合金在潮湿空气中极易被氧化腐蚀;在高温下Mg-8Li合金的钝化膜由于水热改性作用会形成疏松多孔的结构而受到直接破坏;反应介质中Cl-含量增加,则Mg-8Li合金的水解性能增强。增加温度和反应介质中Cl-含量是改善Mg-8Li合金制氢性能的有效手段。

Preparation and Hydrogen Generation Performance of Mg-8Li Alloy

Mg-8Li binary alloy was prepared in vacuum melting furnace with protection of argon. The corrosion status of Mg-8Li alloy under different conditions and the effects of temperature and Cl- concentration on hydrogen generation performance were studied. The results show that Mg-8Li alloy is more likely to be oxidized and corroded in humid air compared with that under natural atmospheric conditions. With hydrothermal modification, the passive film of Mg-8Li alloy becomes loose and porous, and suffers a direct destruction at high temperature. Hydrolysis performance of Mg-8Li alloy improves with increasing of Cl- concentration in reaction medium. Increasing temperature and Cl- concentration in reaction medium is effective to improve hydrogen generation performance of Mg-8Li alloy.