LiCl-NaCl熔融盐体系镁铝合金电化学共沉积的实现  

Realization of Mg-Al alloy preparation by electrochemical co-deposition in LiCl-NaCl molten salt system

作　　者：孙宁磊[1] 朱鸿民[2] 

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《中国有色冶金》2014年第6期79-82,共4页China Nonferrous Metallurgy

摘　　要：采用循环伏安法、电位扫描法和阶跃电流法在973 K的LiCl-NaCl-MgCl_2-AlCl_3熔融盐体系中,对Mg-Al共沉积的可行性进行探讨。结果表明,当Al^(3+)阴极电化学过程为极限扩散控制时,Mg和Al可以在相同的电位下在阴极共同析出,合金理论沉积电压稳定在氯化镁的分解电压附近,随着电解的进行,阴极极化程度逐渐减小,导致槽电压降低。The feasibility of Mg-Al co-deposition by adopting cyclic voltammetry （CV） , linear sweep vohammetry （LSV） and current step technique in LiCl-NaCl-MgCl2-AlCl3 molten salt system at 973K was investigated. The test result shows that Mg and A1 could be co-deposited on cathode under the same potential as long as electrochemical process of Al3＋ on cathode was controlled by diffusion limit. Alloy theoretical deposition voltage was detected stable near the decomposition voltage of MgCl2. The cell voltage was decreased during the process of electrolysis because of the declining of cathode polarization degree.

关 键 词：镁合金 电解共沉积 熔融盐 阴极过程 成分控制 

分 类 号：TF822[冶金工程—有色金属冶金]