Production process of galvanized steel coil

Alu-zinc steel coil refers to a product with an aluminum-zinc alloy layer plated on the surface of the steel plate. It has excellent corrosion resistance, weather resistance and aesthetics, and is widely used in construction, home appliances, transportation and other fields. The following will introduce the production process of galvanized steel coil.
1. Steel plate pretreatment: First, the steel plate is sent to the pretreatment equipment for cleaning to remove grease, oxides and impurities on the surface. The pretreatment equipment usually includes pickling, dissolving, cleaning and drying processes.
2. Coating preparation: The aluminum-zinc alloy coating is prepared, usually by mixing aluminum powder and zinc powder in a certain proportion, and adding organic solvents and adhesives. The mixture is stirred and filtered to form a coating.
3. Coating process: The coating is evenly applied to the pretreated steel plate. The coating process usually includes roller coating and spraying. The roller coating method is to pass the pretreated steel plate through the coating tank, scraper and roller in turn to evenly cover the steel plate with the coating. The spraying method is to spray the paint on the steel plate entering the spraying room, and form a uniform coating through the spray gun.
4. Curing and drying: After the coating is completed, the steel plate is sent to the drying equipment for curing. The purpose of curing is to volatilize the organic solvent in the paint so that the coating forms a dense aluminum-zinc alloy layer.
5. Cooling: The cured steel plate is quickly cooled by the cooling equipment to make the coating more solid.
6. Cutting and coiling: The cooled steel plate is cut according to specifications by the cutting equipment and coiled into coils of different widths and lengths as needed.
7. Inspection and packaging: The quality of the finished aluminum-zinc coil is inspected to check the uniformity, adhesion and corrosion resistance of the surface coating. Qualified products can be sold after packaging.
The production process of aluminum-zinc coils mainly includes steel plate pretreatment, coating preparation, coating process, curing and drying, cooling, cutting and coiling, inspection and packaging. Through these processes, aluminum-zinc coil products with excellent performance can be prepared.