Simple introduce hot dip galvanized
1, the principle of
Hot-dip zinc zinc layer is under the liquid formed by three steps, iron base by zinc dissolving formation on the surface of zinc, iron alloy layer; Zinc ions in the alloy layer further spread to the matrix form zinc, iron miscibility layer; Wrapped in zinc alloy layer of surface layer.
2, performance characteristics,
Thick and dense of pure zinc layer covering the surface of steel fasteners, it can avoid the steel substrate contact with any of the corrosion solution, to protect steel fasteners substrate from corrosion. In general the atmosphere, form a layer on the surface of zinc layer is very thin and dense surface of the zno layer. So it is difficult to dissolve in water, iron and steel fasteners for matrix plays a certain protective effect. If zinc oxide with other components in the atmosphere to generate insoluble zinc salt, the anti-corrosion effect is more ideal; With zinc - alloy alloy layer, in combination with dense, oceanic salt fog in the atmosphere and industrial atmosphere unique corrosion resistance; Due to the combined with strong, zinc, iron miscibility, strong resistance to wear; Because the zinc has good ductility, and its alloy layer and steel substrate adhesion strong, hot galvanizing can be so cold blunt, rolling, drawing, bending and forming process, does not damage the coating; Steel structure after hot-dip zinc, equivalent to an annealing treatment, can effectively improve the mechanical properties of steel matrix, and eliminate the stress of the steel forming during welding, is beneficial to turning processing for structural steelwork; After the hot dipping zinc fastener surface brightness is beautiful; Pure zinc layer is one of the most rich plastic in hot-dip zinc galvanized layer, basic close to the nature of pure zinc, has the good ductility.
3, the application scope of
This kind of plating method is especially suitable for all kinds of acid, alkali corrosive environments, such as the fog.