Hot dip galvanizing factory: the hot dip galvanizing layer is generally more than 35m, even up to 200m, with good hot dip galvanizing coverage, compact coating and no organic inclusions. As we all know, the mechanism of atmospheric corrosion resistance of zinc includes mechanical protection and electrochemical protection. Under atmospheric corrosion conditions, there are protective films of ZnO, Zn (OH) 2 and basic zinc carbonate on the surface of the zinc layer, which slow down the corrosion of zinc to a certain extent. If this protective film (also known as white rust) is damaged, a new film will be formed
Hot dip galvanizing factory: the atmospheric corrosion resistance of hot dip galvanizing to base metal iron is better than that of electro galvanizing.
Hot dip galvanizing factory: the thickness of hot-dip galvanized layer of steel mesh determines the anti-corrosion performance of steel mesh. The user can select the zinc coating thickness higher or lower than the standard. For thin steel mesh with smooth surface and thickness less than 3mm, it is difficult for hot-dip galvanizing manufacturers to obtain thick coating in industrial production. In addition, the thickness of the zinc coating that is not commensurate with the thickness of the steel mesh will affect the adhesion between the coating and the substrate and the appearance quality of the coating. Too much coating will lead to rough appearance, easy peeling of coating, and the steel grating can not withstand collision during handling and installation. If there are more active elements such as silicon and phosphorus in the raw materials of steel mesh, it is difficult to obtain thinner coatings in industrial production. This is because the silicon content in the steel affects the growth mode of the alloy layer between zinc and iron, which will make the phase zinc iron alloy layer grow rapidly and face the surface of the coating, resulting in rough, Matt and poor bonding force of the coating.
Post time: Sep-02-2022