One of the differences between our ordinary steel products and galvanized steel products is that ordinary steel products are easy to corrode and rust. After galvanizing treatment, galvanized products can effectively play the role of anti-corrosion. But it can't be guaranteed that it will not rust after many years. Galvanizing is only a short time, so it must be painted to ensure that it will not rust after more than ten years.
But the base material of anticorrosive coating of galvanized and galvanized steel pipe is very different from that of steel. The galvanized steel plate is too smooth, and the coating is difficult to adhere to the surface, even after it is dry, it is easy to fall off, so it can not achieve the effect of anticorrosion. Therefore, the choice of coating is generally Primer Plus finish. The primer is two-component epoxy zinc yellow primer or epoxy zinc rich primer with strong adhesion, and the top coat is acrylic polyurethane finish or fluorocarbon finish with high hardness. The construction method of galvanized anticorrosive paint is as follows:
First, substrate treatment: the surface of galvanized sheet is very smooth, but also to be polished, so that the surface has a certain roughness is more conducive to paint adhesion.
Second, primer coating: A and B groups of epoxy zinc yellow primer in the ratio of 5:1, mixed with a proper amount of epoxy diluent, fully stirred and evenly sprayed twice, each time interval more than 6 hours and 24 hours of actual work.
Then finish coat: mix group A and group B of acrylic polyurethane finish coat in the proportion of 5:1, add acrylic diluent, mix evenly, spray twice, every time interval is more than 6 hours, dry for 24 hours.
Construction acceptance: after construction, the paint film shall be flat and uniform in color. At this time, there is still residual solvent in the paint that is not volatilized, and it will take about 7 days for the paint to be completely dried to achieve the desired effect.
以上是济南镀锌管厂家为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：http://www.jnxxjm.comThe above is the relevant content introduced by Jinan galvanized pipe manufacturer. For more information, please visit the website: http://www.jnxxjm.com