Preparation of Mg–Li alloys by electrolysis in molten salt at low temperature

Abstract

A new technology for preparation of low cost Mg–Li alloys was studied. The alloys were prepared by electrolysis in molten LiCl–KCl (weight ratio is 1:1) electrolyte with Mg rod severing as the consumed cathode. Main factors that affect current efficiency were investigated, and optimal electrolysis parameters were obtained. Mg–Li alloys with low lithium content (about 25%) were prepared by the unique method of a higher post-thermal treatment temperature after electrolysis at low temperature. The results showed that the electrolysis can be carried out at low temperature, which resulted in reducing preparation cost due to energy saving. The new technology for the preparation of Mg–Li alloy by electrolysis in molten salt was proved to be feasible.