Fluid material can recover from damage rapidly with no demand of external triggering in contrast with the traditional self-healing material which presents low healing efficiency and demands external triggering, such as heat, light, moisture, electricity, etc. However, due to its low viscosity, fluid material is easy to flow away from the surface and thus it is difficult to form a stable coating on the surface to provide practical corrosion resistance to the substrate. Herein, a stable and superfast self-healing coating on steel substrate has been obtained by incorporating carbon nanotube (CNT) into the fluid matrix of epoxy resin (EP) or silicone oil (OIL). To further achieve the active corrosion resistance, 1H, 1H, 2H, 2H- perfluorooctyltriethoxysilane (PTES) which can react with the water inside the coating is added. The coating possesses superfast (tens of seconds) self-healing properties against millimeter-scale scratch repeatedly and excellent corrosion resistance in the aqueous solution of HCl (1 M) and NaOH (1 M). In-situ self-healing and electrochemical behavior in scanning vibrating electrode technique (SVET) measurement indicate the fluid coating possesses infinite self-healing capacity theoretically. Due to its excellent durability and infinite self-healing capacity with short responding time, the optimized fluid coating can be a smart corrosion barrier coating for metals.

流体材料可以快速从损伤中恢复，无需外部触发，而传统自修复材料愈合效率低，需要外部触发，如热、光、湿、电等。粘度大，流体材料容易从表面流走，因此难以在表面形成稳定的涂层，从而为基材提供实用的耐腐蚀性。在此，通过将碳纳米管 (CNT) 掺入环氧树脂 (EP) 或硅油 (OIL) 的流体基质中，在钢基材上获得了稳定且超快的自修复涂层。为了进一步实现主动抗腐蚀性能，添加了1H、1H、2H、2H-全氟辛基三乙氧基硅烷（PTES），它可以与涂层内的水发生反应。该涂层具有超快（数十秒）自愈性能，可抵抗毫米级反复划伤，并在 HCl (1 M) 和 NaOH (1 M) 的水溶液中具有优异的耐腐蚀性。扫描振动电极技术（SVET）测量中的原位自修复和电化学行为表明流体涂层理论上具有无限的自修复能力。由于其出色的耐用性和无限的自愈能力和较短的响应时间，优化的流体涂层可以成为金属的智能腐蚀阻隔涂层。扫描振动电极技术（SVET）测量中的原位自修复和电化学行为表明流体涂层理论上具有无限的自修复能力。由于其出色的耐用性和无限的自愈能力和较短的响应时间，优化的流体涂层可以成为金属的智能腐蚀阻隔涂层。扫描振动电极技术（SVET）测量中的原位自修复和电化学行为表明流体涂层理论上具有无限的自修复能力。由于其出色的耐用性和无限的自愈能力和较短的响应时间，优化的流体涂层可以成为金属的智能腐蚀阻隔涂层。