随着科技及城市现代化的发展,各种管网中钢管的使用越来越多,其外表面涂层材料也在不断改善。本文对钢管外表面防腐涂层的发展现状进行了综述,比较了石油沥青防腐层、环氧煤沥青防腐层、环氧树脂粉末防腐层、聚乙烯防腐涂层及其防腐涂层的优缺点,对涂层材料常见问题及产生的原因进行了一些探讨。 With the development of technology and urban modernization, more and more steel pipes are used in various pipe networks, and the coating materials on the outer surfaces are also constantly improving. In this paper, the development status of anti-corrosion coating on the outer surface of steel pipe is reviewed. The advantages and disadvantages of petroleum asphalt coating, epoxy coal tar coating, epoxy resin coating, polyethylene anti-corrosion coating and their anti-corrosion coating are compared. Some common problems of coating materials and their causes were discussed.