(上海交通大學(xué) 材料科學(xué)與工程學(xué)院 輕合金精密成型國家工程中心，上海 200240)
摘 要: Mg-Li合金作為目前最輕的金屬結(jié)構(gòu)材料，在航空航天、軍事、電子產(chǎn)業(yè)等領(lǐng)域具有良好的發(fā)展前景。但較差的耐蝕性嚴(yán)重制約了Mg-Li合金的廣泛應(yīng)用，因此研究其腐蝕機(jī)理和表面防護(hù)極為重要。基于國內(nèi)外的研究進(jìn)展，綜述了Mg-Li合金的腐蝕機(jī)理，系統(tǒng)總結(jié)了Mg-Li合金的表面防護(hù)方法，包括電鍍、化學(xué)鍍、化學(xué)轉(zhuǎn)化、陽極氧化、涂層涂覆及其他表面防護(hù)方法。建議深入研究各種表面處理方法對Mg-Li合金的防護(hù)機(jī)理，通過涂層的復(fù)合化、自愈化、疏水化來提高涂層對Mg-Li合金的防腐效果。
關(guān)鍵字: Mg-Li合金；腐蝕機(jī)理；化學(xué)鍍；化學(xué)轉(zhuǎn)化；陽極氧化
（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
