烯锌基氟碳超耐久防腐涂装体系设计试验研究

Experimental Research on the Design of Graphene Zinc-based Fluorocarbon Ultra Durable Anti-corrosive Coating System

研究目的:为提升铁路钢桥防腐涂装的防护年限,减少钢桥涂装全寿命周期成本,利用石墨烯对铁路行业标准第7套防腐涂装体系进行改性研究,设计一种新型石墨烯锌基氟碳超耐久防腐涂装体系。研究结论:(1)通过对烯锌基氟碳超耐久防腐涂装体系改性机理分析,适当添加石墨烯可以显著提高石墨烯锌底漆涂层的耐盐雾性能和石墨烯氟碳面漆涂层的耐老化性能;(2)试验结果表明:80μm石墨烯锌底漆涂层耐盐雾性能试验达到4500 h,70μm石墨烯氟碳面漆涂层耐人工加速老化性能试验达到6800 h,其他各项性能指标均满足或优于铁路标准中底漆或面漆的性能指标要求;(3)通过对比已建桥梁工程防腐涂装案例,新型石墨烯锌基氟碳超耐久防腐涂装体系设计防护年限可达30~50年,实现了对桥梁钢结构的长效防护;(4)本研究成果可应用于不同大气腐蚀环境下铁路桥梁及其他领域的钢结构长效防腐涂装设计。

Research purposes:In order to improve the protection period of anticorrosive coating for railway steel bridge and reduce the life cycle cost of steel bridge coating,a new type of graphene zinc-based fluorocarbon ultra durable anti-corrosion coating system was designed by using graphene to modify the seventh set anti-corrosion coating system of railway industry standard.Research conclusions:(1)Through the analysis of the modification mechanism of graphene zinc-based fluorocarbon ultra durable anti-corrosion coating system,the salt spray resistance of the graphene zinc primer coating and the aging resistance of graphene fluorocarbon finish coating can be improved significantly by adding graphene properly.(2)The experiment results show that the salt spray resistance test of 80μm graphene zinc primer coating reaches 4500 h and the aging resistance test of 70μm graphene fluorocarbon finish coating reaches 6800 h,where the other performance indexes meet or are better than those of primer and finish coating in railway standard.(3)By comparing the anti-corrosion coating system cases of the existing bridge engineering,the designed protection period of the graphene zinc-based fluorocarbon ultra durable anti-corrosion coating system can reach 30~50 years,which can achieve long-term protection for steel bridges structure.(4)The research results can be applied to the long-term anticorrosive coating design of steel structures of railway bridges and other fields under different atmospheric corrosion environments.