Hot dip galvanized tube refers to a steel pipe whose surface is improved by the hot dip galvanizing process to improve its corrosion resistance.
Hot-dip galvanizing is the reaction of a molten metal with an iron matrix to produce an alloy layer, thereby combining the substrate and the plating. Hot-dip galvanizing has the advantages of uniform plating, strong adhesion and long service life.
|Product Name||galvanized round/square/rectangular/oval tube/pipe|
|Length||0.3-12m or as your requirement|
|Surface||Pre-galvanized/Hot Dip Galvanized/Oiled/Painted|
|Zinc Coating||50-150g/m2 for Pre-galvanized,200-600g/m2 for hot dip galvanized|
|Standard||ASTM-A53 /BS 1387-1985/ GB/T 3091-2001 for round pipe|
|ASTM A500 /GB/T3094 for square/rectangular pipe|
|Ends||Plain /Beveled/ Threaded with sockets coupling and plastic caps/ Necking down/expanding neck/punching holes|
In order to remove iron oxide on the surface of the steel parts, the hot dip galvanized tubes are pickled. After pickling, it is washed by an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot dip plating bath.
1. Since the pure zinc layer is densely covered on the surface of the steel, it can avoid any corrosion solution contacting the steel substrate and protect the steel substrate from corrosion. In general, a zinc layer can be formed on the surface of a thin layer of dense zinc oxide layer, and it is hardly soluble in water, so the steel substrate is protected.
2. The hot dip galvanized tube is firmly bonded, the zinc-iron is miscible, and the wear resistance is strong.
3. The steel pipe has good ductility, and the zinc layer can firmly adhere to the surface of the steel pipe, so that it can be cold-stamped, rolled, stretched, bent, and the like after hot-plating without damaging the coating.
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