(上海交通大学 材料科学与工程学院 轻合金精密成型国家工程中心，上海 200240)
摘 要: Mg-Li合金作为目前最轻的金属结构材料，在航空航天、军事、电子产业等领域具有良好的发展前景。但较差的耐蚀性严重制约了Mg-Li合金的广泛应用，因此研究其腐蚀机理和表面防护极为重要。基于国内外的研究进展，综述了Mg-Li合金的腐蚀机理，系统总结了Mg-Li合金的表面防护方法，包括电镀、化学镀、化学转化、阳极氧化、涂层涂覆及其他表面防护方法。建议深入研究各种表面处理方法对Mg-Li合金的防护机理，通过涂层的复合化、自愈化、疏水化来提高涂层对Mg-Li合金的防腐效果。
关键字: Mg-Li合金；腐蚀机理；化学镀；化学转化；阳极氧化
（National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China）
Abstract:As the lightest metal structural material, Mg-Li alloy has a good development prospect in the fields of aerospace, military, and electronic industry. However, the poor corrosion resistance seriously limits the wide application of Mg-Li alloy, so it is important to study the corrosion mechanism and surface protection of Mg-Li alloy. Based on the research progress at home and abroad, the corrosion mechanism of Mg-Li alloy was reviewed. The surface protection methods for Mg-Li alloy, including electroplating, electroless plating, chemical transformation, anodic oxidation, overlay coating, and other methods, were systematically summarized. It is suggested that the protection mechanisms of various surface treatment methods on Mg-Li alloy should be further studied, and the anti-corrosion effects of coatings on Mg-Li alloy can be improved by the compositing, self-healing, and hydrophobing of coating.
Key words: Mg-Li alloy; corrosion mechanism; electroless plating; chemical transformation; anodic oxidation
