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介绍了迁移性阻锈剂(migrating corrosion inhibitors,MCI)发展概况及其应用于混凝土结构耐久性保持与提升的意义,探讨了MCI的迁移机制与阻锈机理。提出了MCI分子结构与组成设计原理,认为MCI组成应以含有2个官能基团并能与钢筋配位形成平面性好的5元螯合环的小分子为主体,与具有多个活性吸附中心的不同蒸汽压的化合物复合构成。所制备的MCI不仅具有良好的迁移性能,而且在钢筋表面形成的吸附膜可较长期稳定,在此基础上引入修复组分和防水组分不仅能使氯盐环境下锈蚀钢筋再钝化,还可避免挥发性组分双向扩散,增强钢筋混凝土对环境变化的适应性。同时对MCI迁移能力表征与阻锈效能评价方法以及MCI应用于硬化混凝土表面涂敷和掺入到新拌混凝土时对钢筋混凝土性能影响的试验结果进行了评述,指出了MCI发展方向及其在混凝土结构耐久性保持和提升应用中需要解决的问题。
Abstract：Development and background of migrating corrosion inhibitors (MCI) as well as the significance of maintenance and im-provement of durability in reinforced concrete structure using MCI are introduced. The transfer mechanism of MCI in concrete and the inhibition mechanism of steel bar corrosion are discussed. The design principle of the component and the molecule structure of MCI are suggested. A multiplex inhibitor mainly composed by small molecular ethanolamine having two functional groups and other various components having multi-center of active adsorption with different vapor pressure, which behaviours good migratory per-formance in concrete and long-term stability of film mainly chemisorbed onto the steel surface through the formation of planar five-membered chelate rings with the cation metal has been developed. The introduction of self-repair components and waterproofing components in the inhibitor may lead to the efficacy of repassivation of rusty steel bars in chloride condition and the avoidance of two-way proliferation of volatile components as well as the enhancement of adaptability to the environmental change of reinforced concrete. The token of migratory performance of MCI and appreciation methods of inhibiting efficiency as well as the application research results such as the effect on the durability of reinforced concrete with painting MCI on the hardened concrete surface and the properties of concrete with MCI admixture in the mix are reviewed. The development trend of MCI and the issues to be settled in application techniques of maintenance and improvement of durability of reinforced concrete using MCI are indicated.
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基本信息:
中图分类号:TU528.042
引用信息:
[1]刘志勇,缪昌文,周伟玲,等.迁移性阻锈剂对混凝土结构耐久性的保持和提升作用[J].硅酸盐学报,2008,No.234(10):1494-1500.
基金信息:
交通部西部交通科技(2006zb12)项目;; 江苏省博士后基金(0701046B)资助项目。
2008-10-15
2008-10-15