摘要
水电站金属结构物受到大气、水、泥沙的腐蚀破坏,必须对其进行周期性检修和防腐蚀保护。以三峡 葛洲坝水利枢纽实践为基础,介绍了水电站金属结构物防腐蚀保护方法以及金属层、有机涂料、无机涂料等防腐蚀材料的选用。在高速水流区金属结构物采用环氧金刚砂涂层、热喷碳化钨涂层及钛纳米聚合物涂层,水下金属结构物采用热喷锌层加有机涂料层封闭,大气环境下金属结构物采用环氧类涂料作底涂和丙烯酸聚氨酯涂料作面涂,都取得了比较好的防腐蚀效果。
It is essential to conduct periodic overhaul and corrosion protection for the metal structures used at hydropower station, since they suffer the combined corrosion by atmosphere, water, and silt. Based on the practices with respect to Three Gorges Gezhouba hydro project, the corrosion protection methods for the metal structures of hydropower station were introduced. The selection of the anticorrosion materials such as metal coating, organic paint, and inorganic paint was also discussed. It was found that the epoxy emery coating, thermally sprayed tungsten carbide, and nanometer titanium polymer coating were suitable to the corrosion protection of the metal structures in high velocity flow. Thermally sprayed zinc in combination with organic paint closure was suitable to protect the metal structures under water. And epoxy undercoat combined with acrylic polyurethane paint topcoat was able to effectively prevent the metal structures in atmosphere environment from corrosion. Thus it could be imperative to select proper coatings by taking into account the specific working conditions of the metal structures.
出处
《材料保护》
CAS
CSCD
北大核心
2005年第2期57-60,共4页
Materials Protection
关键词
金属结构物
防腐蚀
水电站
涂层
metal structure
anticorrosion
hydropower station
coating
