Introduction of inorganic fillers into organic coatings is significant for enhancing mechanical properties and corrosion protection. Herein, we utilized the barrier function of the laminar structure (MXene, Ti₃C₂) and the inhibition property of the corrosion inhibitor (CeO₂) to prepare a MXene/CeO₂ polyurethane composite coatings and investigated the corrosion protection performance in 3.5 wt% NaCl solution. Benefiting from the “labyrinth effect” of MXene and the inhibition effect of CeO₂, the composite coating exhibits excellent corrosion resistance. What's more, we introduced the DA bonds into the coating to endow it with self-healing property. The results demonstrated that the obtained composite coating could achieve efficient self-healing behavior under sunlight, and its mechanical properties and anti-corrosion properties were basically unaffected after self-healing. Our strategy presents a new approach to protection of coating for metal substrates and provides the basis for a multi-mechanism synergistic approach to corrosion protection.

将无机填料引入有机涂层对于提高机械性能和防腐蚀保护具有重要意义。在此，我们利用层状结构（MXene，Ti ₃ C ₂）的阻隔功能和缓蚀剂（CeO ₂）的缓蚀性能制备了MXene/CeO ₂聚氨酯复合涂层，并研究了在3.5 wt. % NaCl 溶液。_{受益于 MXene 的“迷宫效应”和 CeO 2}的抑制作用，复合涂层表现出优异的耐腐蚀性。更重要的是，我们将 DA 键引入涂层中，使其具有自愈性。结果表明，所得到的复合涂层在阳光下可以实现高效的自修复行为，自修复后其力学性能和防腐性能基本不受影响。我们的策略提出了一种保护金属基材涂层的新方法，并为多机制协同腐蚀保护方法提供了基础。