镁合金具有很多优异性能，但较差的耐蚀性严重影响其应用前景。目前仅通过物理防护层或借助缓蚀剂来提高其耐腐蚀性能的方法难以满足日益严峻的服役环境。为此，本项目拟于镁合金表面构筑兼具隔绝和缓蚀作用的三重自修复复合膜层体系。具体是将负载缓蚀剂阴离子（一重）的层状双羟基金属氧化物（LDHs）作为纳米容器，用以盛放添加缓蚀剂阳离子（二重）的润滑液，构筑灌注液体型光滑多孔表面（SLIPS，三重），制备SLIPS/LDHs复合膜层。以此实现对镁合金的被动隔绝、主动防护和智能修复。本项目将重点分析SLIPS/LDHs膜层的界面结合机制，研究缓蚀剂的负载/释放行为，探讨微区环境中阴、阳离子型缓蚀剂及润滑液层对复合膜层的协同自修复行为，结合膜层的疏液性，阐释复合膜层的自修复机制，为疏液型三重自修复复合膜层的制备及工程化应用奠定理论基础。

Magnesium alloys possess many good properties, but their poor corrosion resistance significantly restricts the wide applications in practice. It is difficult to meet the increasingly severe service environment, merely based on the physical protection layer or inhibitors. Therefore, this project will construct a triple self-healing composite coating with both isolation and inhibition on the magnesium alloy. In detail, layered double hydroxides (LDHs) with cathodic inhibitors (the first self-healing performance) will act as a nanocontainer to contain lubricant with anodic inhibitors (the second self-healing performance), which is required for the slippery liquid-infused porous surface (SLIPS, the third self-healing performance). The SLIPS/LDHs composite coating is consequently formed, possessing triple self-healing property. It will realize the passive isolation, active protection, and smart repair for magnesium alloys. This project will analyze the interfacial bonding mechanism of SLIPS/LDHs composite coating, study the carry/release behavior of inhibitors, discuss the synergistic self-healing performance of cathodic and anodic inhibitors and lubricant layer under the micro-area electrochemical environment, combine the liquid-repellency, and finally explain the self-healing mechanism of the composite coating. This will provide a theory for the formation and application of liquid-repellent and triple self-healing composite coating.