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Galvanized pipe
Galvanized pipe, also known as galvanized steel pipe, is divided into hot-dip galvanizing and electroplating There are two types of zinc. Hot-dip galvanizing has a thick zinc layer and has the advantages of uniform coating, strong adhesion, and long service life. The cost of electro-galvanized pipes is low, the surface is not very smooth, and its corrosion resistance is much worse than that of hot-dip galvanized pipes.
Main categories
Galvanized steel pipes are divided into cold-galvanized pipes and hot-galvanized pipes. The former has been banned, and the latter has been advocated by the country to be temporarily usable.
Hot-dip galvanized pipe
The molten metal reacts with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to in a hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life. Most of the processes in the north adopt the zinc-replenishing process of direct coiling of galvanized strips.
Cold galvanized pipe Cold galvanizing is electro-galvanizing. The amount of galvanizing is very small, only /, and its corrosion resistance is much worse than that of hot-dip galvanized pipes. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use electro-galvanizing (cold plating). Only small businesses with small scale and old equipment use electro-galvanizing, and of course their prices are relatively cheaper. In the future, cold-dip galvanized pipes are not allowed to be used as water and gas pipes.
Hot-dip galvanized steel pipe The steel pipe matrix undergoes complex physical and chemical reactions with the molten plating bath to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.
The zinc layer of cold-dip galvanized steel pipe is an electroplated layer, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer simply adheres to the steel pipe matrix and falls off easily. Therefore, its corrosion resistance is poor. In new residential buildings, it is prohibited to use cold-dip galvanized steel pipes as water supply pipes.
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Hunan hot-dip galvanized pipe manufacturer direct sales | galvanized welded pipe specifications and models | thin Wall galvanized pipe price, Hunan Gerunde Pipe Industry Co., Ltd. (contact number/WeChat: ) supplies hot-dip galvanized steel pipes, national standard galvanized pipes, thin-walled galvanized wire pipes, cold-dip galvanized pipes, greenhouse galvanized pipes, galvanized pipes Zinc welded pipe, galvanized straight seam pipe, galvanized seamless steel pipe. Complete range of specifications and large quantities available from stock. Consultation
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Manager Tang
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Grunde galvanized steel pipe
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