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What is the Difference Between Galvanized Round Pipe and Hot Dip Galvanized Steel Pipe?

There are many kinds of round pipe materials, the most common is plastic pipe or steel pipe. In addition to these two common round pipes, there are aluminum round pipes, iron round pipes, steel plated round pipes, galvanized round pipes and so on.


Today we will introduce to you the difference between galvanized round pipe and hot-dip galvanized steel pipe.


1. Introduction of galvanized round pipe and hot-dip galvanized steel pipe


1. Structure of hot-dip galvanized steel pipe


The hot-dip galvanized steel pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. The hot-dip galvanized pipe supplied by Hebei Tianchuang Pipe Co., Ltd 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 by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip plating tank.


Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The matrix of the hot-dip galvanized steel pipe undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, its corrosion resistance is strong.


2. Structure of galvanized steel pipe


The galvanized steel pipe adjusts the production process of hot-dip galvanized pipe. The strip steel used for pipe making is first pickled. In order to remove the iron oxide on the surface of the strip steel, after pickling, it is cleaned in a tank with ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride. Sent into the hot dip plating tank. It is then air-dried and made into tubes. The coating layer is uniform and bright, and the amount of zinc coating is small, which is lower than the cost of producing hot-dip galvanized pipes. Its corrosion resistance is slightly worse than that of hot-dip galvanized pipe.


Ⅱ. The differences between galvanized round pipe and hot-dip galvanized steel pipe


1. The hot-dip galvanized steel pipe is snow-white but not shiny or reflective, with a lot of snowflakes on the surface, and zinc tumors (condensed zinc) on both ends.


2. The galvanized tube is shiny white and reflective, with few snowflakes, and the two ports are clean and free of zinc tumors.


The above is the introduction and the differences between galvanized round pipe and hot-dip galvanized steel pipe. The galvanized round pipe is made by chlorination or oxidation, so it has high corrosion resistance and wear resistance, and it is not easy to be corroded by moisture in the air. In addition, the color of the galvanized round pipe is cyan, and it is reflective, which is easy to identify.

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