Galvanized steel pipe: you don't know the galvanized steel pipe small knowledge is here!

Hot dip galvanized steel pipe:

Hot dip galvanized steel pipe is an alloy layer produced by the reaction of molten metal and iron matrix, so that the matrix and coating are combined. Hot dip galvanizing is the first pickling of the steel pipe, remove the iron oxide on the surface of the steel pipe, pickling and sent into ammonium chloride or zinc chloride solution or ammonium chloride and zinc chloride mixed water solution tank for cleaning, and then into the hot dip tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Hot-dip galvanized steel pipe matrix and molten plating solution have a complex physical and chemical reaction, forming a corrosion-resistant and tight structure of zinc-one iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel tube matrix, with its strong corrosion resistance.

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Cold galvanized steel pipe:

Cold galvanized steel pipe is galvanized, galvanized amount is very small, only 10-50g / m2, its corrosion resistance is much worse than hot galvanized rigid pipe. In order to ensure the quality, the regular galvanized pipe manufacturers generally do not use electrogalvanizing, only those small scale, old equipment small enterprises will use electrogalvanizing, and their price is cheaper. The galvanized layer of the cold galvanized steel pipe is an electroplating layer, and the zinc layer and the steel pipe matrix are independently layered. Zinc layer is thin, simple attached to the steel pipe matrix, relatively easy to fall off, its corrosion resistance is poor. The ministry of construction has already formally below, eliminate the technology of backward cold galvanized pipe, not allowed to make water, gas pipe. The use of cold-galvanized steel pipes is also banned in new homes.

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Application of galvanized steel pipe:

a welded steel pipe with hot dip plating or galvanized layer on the surface of galvanized steel pipe. Galvanizing can increase the corrosion resistance of steel pipe and prolong the service life. Galvanized steel pipe use, in addition to the water, gas, oil and other general low pressure fluid pipeline pipe, also used as oil industry especially offshore oilfield pipe, pipeline, chemical coking equipment oil heater, condensing cooler, coal distillation oil exchanger tube, and trestle pipe pile, mine tunnel support frame with pipe, etc. Hot-dip galvanized strip steel pipes are widely used in various modern manufacturing industries.