Galvanized refers metal alloy or other material coated with a layer of zinc from the beautiful, rust and other effects of surface treatment technology. The method is mainly used in hot-dip galvanizing. Soluble in acid zinc galvanized square tube 152 * 152, it can be dissolved in alkali, so called amphoteric metal. Zinc hardly changed in the dry air. In humid air, the zinc surface will generate dense basic zinc carbonate film. Containing sulfur dioxide, hydrogen sulfide and marine atmosphere, poor corrosion resistance of zinc galvanized square tube 140 * 140, especially in hot and humid atmosphere containing organic acids, the zinc coating can easily be corroded. Standard electrode potential for zinc -0.76V, the steel substrate, the zinc coating are anodic coating, it is mainly used to prevent corrosion of iron and steel, the merits of its relationship with the protective properties of the coating thickness is very big. Zinc coating after passivation, dyeing or coating protective agent, can significantly improve their protective and decorative. Square galvanized steel (steel) production process: Feeding → pickling, drying washing → solvent → → → galvanized square steel inner and outer blowing → roll standard, identification → passivation → test → packaging. Feeding: Meaning: When parts need storage for a long time and passivation between the response in order to prevent corrosion during storage and transportation. It is often referred to white rust corrosion products. Common methods of chromate passivation and phosphate method. 1, passivated galvanized square steel tube manner spray directly on top of the passivation solution on the runway at one meter distance from the location where the spray by blowing steam wiped the knife was attached, attention must be blowing. 2, using compressed air wipe, blow off pipe attached to the liquid surface and the coating evenly. By adjusting the air pressure to adjust the size of the coating thickness galvanized square pass, must not have extra liquid zinc tube attached to the bead surface. Roll-galvanized pipe, roll bar and packaging: 1, Standard roll, roll bars: 1) roll marking machine work, is prohibited touch roll-roll to prevent pressure hand; non-standard double-barreled through the rolling machine to prevent pressure roll damage. 2) galvanized pipe roll-galvanized square tube 135 * 135 roller conveyor operation, roll-confidential according to different specifications, replace the note, to replace a standard wheel height to be adjusted once the pressure, and often add oil. 3) Roll label machine apron should always check and found a crack must be promptly replaced. 4) tire pressure should be at the center of the pipe line, up and down to adjust the angle of the fixing bolts good pressure. 5) When printing logo ring, two at the same time you want to scroll, roll steel with blankets should always add ink, but not too much ink. Galvanized square tube, galvanized square tube 130 * 130, 1000-steel (certified merchants) provided by the Tianjin Steel Pipe Co., Ltd. Rong thousand. 1000-Tianjin Steel Pipe Co. (www.tjqre.com) (www.tjqre.com) is specialized in the "pipe, rectangular pipe, galvanized pipe, galvanized flat steel, pipe, galvanized pipe," the business, Companies adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Li Guoen.