In this work, a new type of cerium oxide particles with a graded mesoporous structure (Hierarchically meso-mesoporous cerium oxide, HMCe) was prepared as both inhibitor and carrier for loading 2-MBI (2-mercaptobenzimidazole) inhibitor, which was encapsulated by Eudragit E100 (EE100, a kind of amino methacrylate copolymer) to construct smart containers with pH controlled-release properties. The smart containers were added to a water-borne epoxy coating to develop active anti-corrosion coating on mild steel. The corrosion inhibition effect of 2-MBI and mesoporous cerium oxide particles was evaluated. Furthermore, the release of 2-MBI from the smart containers in response to acidic corrosion solution was also investigated using UV–vis spectroscopy. Electrochemical impedance spectroscopy (EIS) and salt spray tests were employed to evaluate the barrier properties and the active anti-corrosion performance of the coatings. The results showed that coating with newly designed smart containers has better anti-corrosion performance than coating with cerium oxide particles or 2-MBI alone. This work provides a new way to fabricate containers and actively protective coatings.

在这项工作中，制备了一种具有梯度介孔结构的新型氧化铈颗粒（Hierarchically meso-mesoporous cerium oxide，HMCe）作为抑制剂和载体，用于负载2-MBI（2-巯基苯并咪唑）抑制剂，其被Eudragit包裹。 E100（EE100，一种氨基甲基丙烯酸酯共聚物）构建具有pH控释特性的智能容器。将智能容器添加到水性环氧涂层中，以在低碳钢上形成活性防腐涂层。评价了2-MBI和介孔氧化铈颗粒的缓蚀效果。此外，还使用紫外-可见光谱研究了响应酸性腐蚀溶液的智能容器中 2-MBI 的释放。采用电化学阻抗谱（EIS）和盐雾试验来评估涂层的阻隔性能和主动防腐性能。结果表明，新设计的智能容器涂层比单独使用氧化铈颗粒或2-MBI涂层具有更好的防腐性能。这项工作提供了一种制造容器和主动保护涂层的新方法。