单组分湿固化聚脲／聚氨酯防腐涂料在钢结构大桥防腐维修中的应用

摘要

The steel beam bridge structure anticorrosion design and performance of three bridges on the river Huangpujiang were introduced. Based on the corrosion ambient condition, the disadvantages and limitations of traditional epoxy system, a bridge anticorrosion repair procedure were recommended. The performance characteristics and application procedure of the one component moisture curing polyurea/polyurethane coatings were described, and compared it with two components surface tolerant coatings.%介绍了黄浦江上南浦、杨浦、徐浦3座大桥钢箱梁结构的涂装情况。根据3座大桥所处的腐蚀环境和传统环氧涂料施工的局限性，提出了大桥防腐维修方案。阐述了单组分湿固化聚脲／聚氨酯涂料的性能特点和施工工艺流程，并与双组分低表面处理涂料的性能进行比较。