摘要
根据钢结构所处的腐蚀环境、涂装部位和预期使用寿命设计相应的涂层配套体系,是现代桥梁钢结构防腐涂层体系设计的基本原则。本文介绍了桥梁钢结构所处的腐蚀环境,JT/T722–2008标准对桥梁钢结构涂装部位和防腐年限的有关界定,不同腐蚀环境下桥梁钢结构防腐寿命和漆膜厚度的关系,以及长效型防腐涂层配套体系。论述了高性能防腐涂料在现代桥梁钢结构中的应用状况:底漆通常采用环氧富锌底漆、醇溶型无机富锌底漆、热喷铝/锌涂层和水性无机富锌底漆等,中间漆通常采用环氧云铁中间漆,耐候面漆普遍采用丙烯酸聚氨酯面漆和FEVE氟碳面漆。
A basic principle in designing corrosion- protective coating system for modern bridge steel structure is to design a corresponding coating accessory system according to corrosion environment, coating part and prospective service life of steel structure. In this paper, an introduction was given of the corrosion environment of bridge steel structure, related definition for coating part and corrosion protection life of bridge steel structure by JT/T 722-2008 standard, relationship between corrosion protection life and coating thickness and the long-term corrosion-protective coating accessory system of bridge steel structure. The application status of high-performance corrosion protective coating to modern bridge steel structure was discussed as follows： the primer usually used includes epoxy zinc-rich primer, alcohol-soluble inorganic zinc-rich primer, thermal spraying aluminum/zinc coating and waterborne inorganic zinc-rich primer; epoxy micaceous iron oxide intermediate coating is used as a midcoat; and acrylic polyurethane and FEVE fluorocarbon topcoats are generally employed as weather-proof topcoat.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2011年第1期57-62,共6页
Electroplating & Finishing
关键词
桥梁钢结构
防腐
涂层体系
设计
bridge steel structure
anti-corrosion
coating system
design
