混凝土防腐涂料的研究进展

混凝土具有多孔结构,水和离子可通过其孔隙渗入其内部,对其造成腐蚀。混凝土也是一种脆性材料,在应力的作用下,混凝土产生的微裂缝更进一步加快混凝土的腐蚀速度。混凝土防腐与基础和工业建设直接相关,发展高性能混凝土防腐涂料对于延长混凝土服役时间十分重要。文中系统介绍了混凝土的腐蚀机理并总结了硅烷及硅氧烷类涂层、表面成膜及孔隙封闭型涂层的研究现状和存在的问题。文中还结合课题组相关工作,重点介绍了渗入固结型混凝土防腐涂料的防护机理及防腐性能。最后,展望了混凝土防腐涂料未来的发展方向。

Progress in Anticorrosive Coatings for Concrete

The concrete suffers from deterioration caused by permeation of ions and water due to its porous structure. It is also easy to crack with brittleness in nature, which speeds up the corrosion. The anticorrosion of concrete plays an important role in infrastructure and industry construction. An coating is one of the most effective approaches to protect concrete. In this paper, the corrosive mechanism of concrete is introduced. The recent progress in coatings for concrete protection, including silane and siloxane-based coating, surface layer, pore-sealing layer is reviewed. In particular, a novel permeable and in-situ curable anticorrosive coating (PSEp) is introduced in terms of its protective mechanism and anticorrosive properties. Finally, the future trends of anticorrosive coatings for concrete are given.