Screening of Anticorrosion Primer and Coating System for Corroded Transmission Towers

According to the national standard, the mechanical properties and anticorrosion performance of samples of the primer and coating systems were tested, which used the phosphating solution as pretreatment agent of corroded transmission towers and coated four kinds of anticorrosion primer on phosphating films. The results showed that epoxy iron-red antirust primer with phospahting film had the best compatibility with the zero adhesion grade, 720 h sodium chloride soaking time, 72 h frame salt spray time and 1 000 h anticorrosion of salt spray without foaming, rusting and exfoliation; while the coating system consisted of epoxy iron-red antirust primer, epoxy micaceous iron intermediate coat and fluoro-carbon top-coat had the best mechanical properties and anticorrosion performance, the zero adhesion grade, 480 h alkali and water soaking time and 3 000 h anticorrosion of salt spray without foaming, rusting and exfoliation.