The characteristics of galvanized steel pipe: the zinc coating is thick, the crystallization is detailed, uniform and non porous, and the corrosion resistance is excellent; The zinc coating obtained by electroplating is relatively pure, and it corrodes slowly in acid, alkali and other mists. It can protect the steel substrate effectively. Because the zinc coating has excellent ductility, it can be formed by cold punching, rolling, bending and other processes without damaging the coating.
After chromate passivation, the zinc coating forms white, colorful, military green, etc., which is beautiful and generous, and has certain decorative properties. It has a thick, fine and dense pure zinc layer to cover the steel surface, which can prevent the steel substrate from touching any corrosion solution, and protect the steel substrate from corrosion. In general atmosphere, the appearance of zinc layer forms a very thin and dense zinc oxide layer.
It is difficult to dissolve in water, so it plays a certain role in protecting the steel matrix. If zinc oxide and other components in the atmosphere generate insoluble zinc salts, the anti-corrosion effect will be more ambitious. It has an iron zinc alloy layer with fine bonding, which reflects the unique corrosion resistance in the marine salt fog atmosphere and industrial atmosphere. Due to its strong bonding, zinc iron is mutually soluble, and has strong wear resistance.
After hot-dip galvanizing of steel structures, it is equivalent to a single annealing treatment, which can effectively improve the mechanical function of the steel substrate, eliminate the stress during the forming and welding of steel parts, and facilitate the turning of steel structures. Because zinc has excellent ductility, and its alloy layer is firmly attached to the steel substrate, the hot-dip galvanized parts can be formed by cold punching, rolling, wire drawing, zigzagging, etc. without damaging the coating.
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