The manufacturing process of hot-dip galvanized steel plate usually includes the following steps:
1. Raw material preparation: Select steel plates that meet the requirements as raw materials.
2. Surface treatment: Clean and treat the surface of the steel plate to ensure that the surface is smooth and free of oil and impurities.
3. Pickling: Pickling is used to remove oxides, rust and other impurities on the surface of the steel plate to improve the galvanizing effect.
4. Hot-dip galvanizing: The pickled steel plate is immersed in molten zinc liquid preheated to a certain temperature, so that the surface is covered with a layer of zinc coating.
5. Cooling: The galvanized steel plate is quickly cooled through cooling equipment to solidify the zinc layer.
6. Leveling and cutting: Level and cut the galvanized steel sheet as needed to make it meet the specifications.
7. Finished product inspection: Inspect the appearance quality, coating thickness, adhesion, etc. of the finished product to ensure that the product quality meets the standards.
8. Packaging and transportation: Pack the qualified galvanized steel plates for easy transportation and protection.
The above is the general manufacturing process of hot-dip galvanized steel sheets. The specific steps may vary due to different production processes and equipment.