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Galvanized steel pipe classification by kairuida cangzhou
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Galvanized steel pipe classification |
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Galvanized Square Steel Tube of cold- plated , hot dip tube , the former has been disabled , the latter also being able to state advocates . Hot dip galvanized pipe Hot dip galvanized pipe is molten matrix metal and react to produce iron alloy layer , so that the substrate and coating combination of both . Hot- dip galvanized steel pickling is the first , in order to remove the surface oxide steel after pickling , by ammonium chloride or zinc chloride and zinc chloride aqueous solution or mixed aqueous solution tank for cleaning , and then into hot-dip plating bath . Hot- dip galvanized with coating uniformity, strong adhesion , long life and other advantages. Cold galvanized pipe Cold galvanizing is galvanized, galvanized rarely, and only 10-50g/m2, its own hot dip galvanized pipe corrosion resistance than a lot of difference . Regular Galvanized Steel Pipe Manufacturers, in order to ensure quality , most do not use electro-galvanized ( cold plating ) . Only those small, outdated equipment and small businesses employ electro-galvanized , of course, their prices are relatively cheaper. Currently the Ministry of Construction has been formally below , eliminate backward technology of cold galvanized pipe , galvanized steel pipe with cold future not be allowed for water, gas pipes . Hot dip galvanized steel pipe : steel substrate occurs with molten bath complex physical , chemical reactions, the formation of corrosion-resistant zinc -iron alloy compact structure layer . Alloy layer and layer of pure zinc , steel base blend. So the corrosion resistance ability. Cold galvanized steel : zinc layer is electroplated layer, the zinc coating and steel substrate independent stratification. Thin layer of zinc , zinc adhered to the steel substrate is simple , and easy to fall off . So the poor corrosion resistance . In new residential , prohibit the use of cold Galvanized Steel Pipe Supply as a water pipes.
Related Articles -
Galvanized Steel Pipe Manufacturers, Galvanized Square Steel Tube, Galvanized Steel Pipe Supply,
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