Principle of Hot-Dip Galvanized Zinc Layer Is Liquid at High Temperatures

Principle of hot dip galvanized steel pipe Hot-dip galvanized zinc layer is liquid at high temperatures, the formation of three steps: 1, the iron-based surface is dissolved to form zinc and zinc - iron alloy phase layer; 2, zinc alloy layer in the further diffusion of the substrate layer of zinc, iron solubility; 3, the envelope surface alloy layer with zinc coating. Performance characteristics of hot dip galvanized steel pipe (1) hot-dip galvanized steel pipe with a thick dense layer of pure zinc covering the steel surface, it can avoid any of the steel substrate and the corrosive solution of contact, to protect the steel substrate against corrosion. In general the atmosphere, the surface to form a thin zinc layer and dense layer of zinc oxide surface, it is difficult to dissolve in water, so the steel substrate plays a protective role. If the zinc oxide and other components in the atmosphere forming insoluble zinc salts, the corrosion effect is better. (2) with iron - zinc alloy layer, combined with the dense, the atmosphere and the ocean salt spray performance of specific industrial atmospheric corrosion resistance; (3) The combination of solid, zinc - iron solubility, has a strong resistance to abrasion; (4) Because zinc has a good ductility, the alloy layer and attached to a solid steel base, so the cold can be hot-dip pieces of red, rolling, drawing, bending and other forming without damage to the coating; (5) hot dip galvanized steel structure, the equivalent of an annealing treatment can effectively improve the mechanical properties of steel substrate, forming steel welding to eliminate the stress is conducive to turning on the steel structure. (6) hot-dip galvanized surface after the bright and beautiful. (7) pure zinc coating is the richest plastic hot dip galvanized zinc coating layer, close to the nature of the basic pure zinc, malleable, so it is full of flexibility. Application of hot dip galvanized steel pipe With the application of hot-dip galvanizing a corresponding expansion of industrial and agricultural development. Therefore, the hot dip galvanized products in the industry (such as chemical facilities, oil processing, marine exploration, metal structure, power transmission, shipbuilding, etc. ), agriculture (such as: Irrigation, warm room), construction (such as: Water and gas transmission, wire sets tubes, scaffolding, housing, etc. ), bridges, transportation, etc., in recent years has a lot to be used. As the hot dip galvanized products have beautiful appearance, good corrosion resistance characteristics, and their use more widely. Source:carbon-pipe.com