The poor dispersion of carbon nanotubes (CNTs) limits their practical enhancement in polymer matrix due to strong Van der Waals force among them and their high aspect ratio. Here, a highly dispersed silica/carbon nanotube (HAC) nanomaterial was prepared, which effectively solved the agglomeration problem of CNTs-based materials. More importantly, X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TG) and UV–vis spectra results confirm that HAC nanomaterials can achieve the loading and release of corrosion inhibitors. Basing on these, we developed a smart self-healing coating system (HACB/EP) to further improve the corrosion resistance of the coating. Electrochemical impedance spectroscopy (EIS) investigation shows that HACB/EP still has the highest low-frequency impedance value compared with other coatings after 30 d of immersion, and the electrochemical self-healing efficiency (η_es) of HACB/EP with an artificial defect (De-HACB/EP) turns into positive values at the second (24–48 h) and third (48–72 h) stage. In general, the enhanced corrosion protection and excellent self-healing performance of HACB/EP will greatly promote the development of smart anticorrosion coatings.

由于碳纳米管 (CNT) 之间的强大范德华力和高纵横比，碳纳米管 (CNT) 的分散性差限制了它们在聚合物基体中的实际增强。在这里，制备了一种高度分散的二氧化硅/碳纳米管（HAC）纳米材料，有效地解决了碳纳米管基材料的团聚问题。更重要的是，X射线光电子能谱（XPS）、热重分析（TG）和紫外-可见光谱结果证实HAC纳米材料可以实现缓蚀剂的加载和释放。在此基础上，我们开发了智能自修复涂层系统（HACB/EP），以进一步提高涂层的耐腐蚀性能。电化学阻抗谱（EIS）研究表明，在浸泡 30 d 后，HACB/EP 与其他涂层相比仍具有最高的低频阻抗值，具有人工缺陷（De-HACB/EP）的 HACB/EP 的_es）在第二（24-48 小时）和第三（48-72 小时）阶段变为正值。总的来说，HACB/EP增强的防腐性能和优异的自愈性能将极大地促进智能防腐涂料的发展。