hot dip galvanized

How hot-dip galvanizing prevents rust: hot-dip galvanizing has a thick and dense pure zinc layer covering the surface of steel fasteners, which can prevent the steel substrate from contacting any corrosive solution, and protect the steel fastener substrate from corrosion. In the general atmosphere, a thin and dense zinc oxide layer is formed on the surface of the hot-dip galvanized zinc layer. It is difficult to dissolve in water, so it has a certain protective effect on the base of steel fasteners. If zinc oxide generates insoluble zinc salt with other components in the atmosphere, the anti-corrosion effect is more ideal; it has a zinc-iron alloy alloy layer, which is densely combined, and exhibits unique corrosion resistance in marine salt spray atmosphere and industrial atmosphere; due to the combination It is firm, zinc-iron is mutually soluble, and has strong wear resistance; because zinc has good ductility, its alloy layer is firmly attached to the steel matrix, so hot-dip galvanizing can be cold punched, rolled, wire drawn, bent, etc. The forming process does not damage the coating; after the steel structural parts are hot-dip galvanized, it is equivalent to an annealing treatment, which can effectively improve the mechanical properties of the steel matrix, eliminate the stress during the forming and welding of the steel parts, and is beneficial to turning the steel structural parts; The surface of the fastener after galvanizing is bright and beautiful; the pure zinc layer is the most plastic galvanized layer in hot-dip galvanizing, and its properties are basically close to pure zinc, and it has good ductility.