Hot-dip galvanizing for steel grating has the following advantages: good principle, good properties, good technology, good use effect, and high environmental value.
Hot-dip galvanizing is a steel body that is galvanized on the surface under hot-dip conditions. It has strong adhesion and is not easy to fall off. Although hot-dip galvanized pipes may also be rusted, they can meet technical and hygienic requirements in a long period of time. Require. Hot-dip galvanizing involves degreasing, pickling, dipping, and drying the workpiece, then immersing it in the molten zinc solution for a certain period of time and then lifting it out.
Cold galvanizing uses electrolytic equipment to degrease and pickle the workpiece and put it into a solution composed of zinc salts, and connect it to the negative electrode of the electrolytic equipment; place a zinc plate opposite the workpiece and connect it to the positive electrode of the electrolytic equipment, and turn on the power , using the directional movement of current from the positive electrode to the negative electrode, a layer of zinc will be deposited on the workpiece.
The difference between galvanized finished products: The surface of hot-dip galvanizing is not as delicate and bright as cold-dip galvanizing, but the thickness of the zinc layer is dozens of times that of cold-dip galvanizing. The anti-corrosion performance is also dozens of times that of electroplated zinc. Hot-dip galvanizing emits less pollutants. The pollutants of hot-dip galvanized steel grating are mainly waste acid from pickling workpieces. The pollutants of cold galvanizing mainly include waste acid from pickling workpieces, waste electroplating liquid, waste passivation liquid, etc. The type and quantity of pollutant emissions from cold galvanizing are much greater than those from hot dip galvanizing. Therefore, Hebei Xiaodi Steel Grating Factory recommends that customers purchase hot-dip galvanized steel gratings. Hot-dip galvanizing is also called hot-dip galvanizing. It melts zinc ingots, zinc bars, and zinc blocks at high temperatures, then puts in some auxiliary materials, and then immerses the metal structural parts in the galvanizing tank to adhere to the metal components. A layer of zinc. The advantages of hot-dip galvanizing are its strong anti-corrosion ability and good adhesion and hardness of the galvanized layer. Cold plating is also known as electro-galvanizing, which uses zinc salt solution through electrolysis to coat a thin layer on the plated parts. Generally speaking, no heating is required. The amount of zinc applied is very small, and it will easily fall off when encountering a humid environment.
Hot-dip galvanizing is a chemical treatment and an electrochemical reaction. Cold galvanizing is a physical treatment, it just brushes a layer of zinc on the surface, so the zinc layer is easy to fall off. Hot dip galvanizing is often used in building construction. Continuous hot-dip galvanizing process: steel → heating → cooling to galvanizing temperature → galvanizing → cooling. Cold galvanizing only has 10-50g/m2, and its corrosion resistance is much worse than hot dip galvanizing. The price of electro-galvanizing is relatively cheaper.
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