介绍了低共熔溶剂的性质及特点，综述了低共熔溶剂的国内外最新研究成果，特别是氯化胆碱基低共熔溶剂在镁合金腐蚀防护的应用，分析了镁合金在低共熔溶剂中进行表面处理的可行性。概述了在含氯化胆碱的低共熔溶剂介质中，通过热场、声场、电场以及DES液膜法调控开展镁合金表面化学转化膜的制备、耐蚀机理及反应介质的作用研究，同时将低共熔溶剂与疏水性仿生膜结合，设计出镁合金表面自愈合超疏水涂层。利用低共熔溶剂制备的转化膜的耐蚀性均明显高于镁合金基体，其腐蚀电流密度明显下降。最后对镁合金腐蚀防护的研究现状和方向进行了展望，希望对解决镁合金腐蚀起到一定的指导意义。

The properties and characteristics of DESs were introduced, the latest research progress about the eutectic solvents were reviewed, especially on the application of deep eutectic solvents (i.e. the choline chloride (ChCl)/urea mixture) in corrosion protection of Mg alloy, and the feasibility of surface treatment for magnesium alloys by deep eutectic solvents was analyzed. The preparation, corrosion resistance mechanism and the function of reaction medium of conversion coatings on magnesium alloys through the regulation of thermal field, acoustic field, electric field and DES membrane method were summarized and the deep eutectic solvent was combined with the hydrophobic biomimetic film at the same time to design a self-healing superhydrophobic coating on the surface of the magnesium alloy. The corrosion resistance of conversion films prepared by deep eutectic solvents was significantly higher than that of the magnesium alloy substrates, and the corrosion current density was significantly decreased. Finally, the future research orientation of corrosion protection of magnesium alloys was prospected. It is expected to have reference significance on the corrosion of magnesium alloys.