The difference between blow galvanizing and hanging galvanizing?



1. Rack galvanizing is different from blow galvanizing. The amount of zinc on the rack galvanizing is high, and the thickness of the zinc layer can reach more than 400 microns. Some steel products built are suitable for rack plating, such as thick-walled square tubes, spiral tubes, and large diameters. Wall longitudinally welded pipe, I-beam, channel steel and other pipes and profiles

2. The rack galvanizing process is to first carry out the relevant pickling of the material. In order to remove the iron oxide part on the surface of the material, after the pickling, pass these solutions of ammonium chloride or zinc chloride water or ammonium chloride and chlorination The mixed aqueous solution of zinc is cleaned in the tank, and then sent to the hot-dip plating tank. The products produced by rack plating are anti-corrosion and anti-oxidation, and the service life can reach 40-50 years.

3. The output of blow galvanizing is relatively high, which is suitable for some small steel products, such as angle steel, small-diameter pipes, thin-walled pipes, and the thinnest product is not less than 1.0mm, and the thickness of the zinc layer is about 20-30. The blow-plating process also firstly carries out the related pickling of the material, the matrix and the molten galvanizing bath undergo a complex physical and chemical matrix fusion, and then lift the material that needs to be galvanized with the lifting frame and the outer air ring. Blow outside through the outer wind ring. The surface of the product produced by blow plating is smooth and shiny, and it also has the advantages of corrosion resistance and oxidation resistance. The service life is about 20 years.

4. Rack galvanizing is done for the galvanizing that cannot be completed by blow galvanizing or the zinc layer that requires relatively high requirements.

5. Blow galvanizing is a galvanizing treatment for mainland galvanized pipes.

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