钢结构的防腐措施之涂层法发布时间：2015/10/12 9:13:49 浏览次数:772
Anticorrosive coating method is better than general long-term anti-corrosion methods (but the fluorine carbon paint anticorrosion fixed number of year even up to 50 years). So for indoor steel structure or outdoor steel structure is more relatively easy to maintain. It is a low cost, but when used in outdoor maintenance cost is higher. The first step is to rust removing coating method of construction.
High quality coating depends on thorough cleaning. So demanding coating generally use sand blasting derusting, showing the luster of the metal, remove all the rust and oil pollution. Site construction coating available manual derusting. The choice of coating should be consider the surrounding environment. Different coating have different tolerance to different corrosion conditions. Usually have a primer coating (layer) and finishes (layer). More primer containing powder, less makings. Film is rough, strong adhesion with the steel, and paint with good. Paint the makings, film-forming luster, can protect the primer from atmospheric corrosion, and resistance to weathering. Between different coatings are compatible or not, when choosing different coatings before and after the need to pay attention to the compatibility of them. Coating construction must have the appropriate temperature (between 5 ~ 38 ℃) and humidity (relative humidity is not greater than 85%). Less dust coating construction environment, the component surface there can be no condensation. 4 hours after coating must not get wet in the rain.
Coating generally do 4 ~ 5 times. Outdoor project total dry film thickness is 150 microns, indoor project is 125 microns, allowable deviation of 25 mu m. or sea at the beach or in a strong corrosive atmosphere, total dry film thickness can be upset for 200 to 220 microns.