Welded Galvanized steel grating
The welded galvanized steel grating is made of stainless steel or low carbon steel. The welded galvanized steel grating is widely used in construction, petroleum, chemical industry, power plants, sewage treatment plants, food processing plants, and other industries. Electro-galvanized layers are thin and hot-dip galvanized layers are thick. In addition to being corrosion resistant, it is also anti-rust. There are two types of bearing bars in welded galvanized steel grating: flat bars and I-bars. Bearing bars are separated by a distance called pitch or pitch distance.
The Process Flow for Galvanized Steel Gratings
Step 1: Pre-Treatment:
By shot blasting or degreasing the steel gratings, rust, paint, oil, and other contaminants are removed. In an acid bath, galvanized steel grating is cleaned of mill scale. Surfaces of the gratings are coated with a zinc-iron alloy through this process. Steel has a higher melting point than zinc-iron alloy, which prevents iron from rusting.
Step 2:Pickling:
Pickling is used to remove the oxide layer on the surface of galvanized steel gratings. By immersing the gratings in an acid bath, this is accomplished. Hydrochloric acid is the most commonly used acid for pickling. Hydrochloric acid is also called a “pickling agent” because it helps to remove the oxide layer quickly.
Step 3:Fluxing:
Galvanized steel gratings are flushed to remove impurities from their surfaces. An acidic solution is passed through the gratings to remove the impurities. In most cases, zinc chloride is used as a flux. Besides providing a barrier against corrosion, zinc chloride also helps to remove impurities quickly. As a result, it is also known as a “fluxing agent”.
Step 4:Hot-Dip Galvanizing:
In hot-dip galvanizing, gratings are dipped in molten zinc baths. In galvanized steel gratings, zinc-iron alloys are formed on the surface by using molten zinc baths. That’s why hot-dip galvanizing is also called zinc-iron alloying. It also provides corrosion resistance.
Step 5:Cooling:
In addition to hot-dip galvanizing, the gratings are cooled in air or water after they have been galvanized. During the cooling process, the zinc-iron alloy on the surface of the gratings solidifies. A galvanized steel grate that has been cooled in air is called an “air-cooled” grate. In addition, water-cooled galvanized steel grating is known as “water-cooled” grating.
Step 6:Passivation:
Passivation is the only process flow of galvanized steel grating that is not always performed. Acidic solutions are used to passivate gratings. The gratings must be made of stainless steel in order to achieve this process. Passivation is principally used to eliminate contaminants from the exterior of gratings.
Step 7:Packaging(1 days)
Packing steel gratings requires special care and attention to avoid damage during transportation. We use high-quality packing materials to avoid damage during transportation. Fill the gaps between each grate with packing material such as styrofoam peanuts or bubble wrap, and wrap each grate in a layer of plastic film. Place the grates in a box or crate. Put a date and contents label on the box or crate and seal it with tape. If you follow these packing tips, your steel grates will be protected from rust and corrosion while they are being stored or transported.
