In order to put the farm into production more quickly, many farmers choose to lay the membrane tile directly on the beam, which is simple, quick, and saves worry and effort. The coated tile is made of coated steel plate, which is to coat a layer of anti-corrosion color film on the surface of the thin steel plate with galvanized or galvanized.
The interior of the pig house mainly produces ammonia gas, which is alkaline in the presence of moisture in the air. According to the use experience of Unisha, the internal walls and ceiling of the pig house are made of galvanized film, and the roof tile is made of galvanized film. board is better.
When many people buy coated tiles, it is easy to ignore the thickness of the coating. Conventionally, the larger the coating thickness, the better the corrosion resistance.
The thickness of the coating mainly affects the notch corrosion performance of the coated steel plate. The notch corrosion is electrochemical corrosion, and the influencing factors include the pretreatment layer, the primer, the thickness of the substrate, and the thickness of the coating. Under normal circumstances, the pretreatment layer and the primer are relatively fixed, and the thickness of the substrate and the coating layer affect the corrosion performance of the incision. The thinner the substrate and the thicker the coating, the better the resistance to notch corrosion. Regarding this point, there are many studies in the world, and the most commonly recognized is the zinc ratio. That is, the number of grams of coating weight per square meter on one side of the coating / the thickness of the substrate (in millimeters). It is considered that the zinc ratio greater than 100 is the guarantee to prevent the notch corrosion of the coated steel sheet. For example, if the steel plate is 0.6mm, the amount of galvanizing on one side should reach 60 grams/square meter. Although the corrosion resistance of galvanized sheet is better than that of hot-dip galvanized, the zinc ratio is also suitable for hot-dip galvanized in terms of notch corrosion propagation.
