Zinc is easily dissolved in acid and can also dissolve in alkali, so it is called a sexy metal. Zinc almost does not change in dry air. In humid air, zinc surface will generate dense alkaline -type zinc carbonate films. In the atmosphere of sulfur dioxide, hydrogen sulfide, and marine atmosphere, zinc resistance is poor, especially in the atmosphere of high temperature and high humidity containing organic acids, zinc grids are easily corroded.
Hot -dip galvanized pipe: It is a alloy layer that causes melting metal to react with the iron -based body, so that the substrate and the coating are combined. The hot -dip galvanized steel pipe is used to pick up the steel pipe. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in a mixed aqueous solution groove of ammonium chloride or zinc chloride or ammonium chloride, and then sent to it Hot immersion groove. Thermally galvanized has the advantages of uniform coating, strong adhesion, and long service life. Most of the North craftsmanship uses a zinc -galvanized belt to roll zinc supplementation.
Hot -dip galvanized steel pipes: The steel pipe matrix and melting plating fluid have complex physical and chemical reactions, forming a tight zinc one -iron alloy layer with corrosion resistance. The alloy layer is integrated with the zinc layer and the steel pipe matrix. Therefore, its corrosion resistance is strong.
In order to improve the corrosion resistance of the steel pipe, galvanized the general steel pipe. Galvanized steel pipes are divided into two types: hot -dip galvanized and electroplating. The hot -dip galvanized and galvanized layer is thick. The cost of electroplating is low, and the surface is not very smooth. Oxygen welding pipe: used as a steelmaking oxygen blowing pipe. Generally, a small-caliber welding steel pipe is used. The specifications are eight in eight 3/8-2 inches. It is made of steel bands of 08, 10, 15, 20 or 195-Q235. For corrosion, some should be effectively penetrated.
Production Process:
Galvanized belt → open roll → stretching → rolling tube → welding → scarring → passivation and rinse → zinc supplement → setting → typing logo → tailoring → drying → pounds.
