The production process of galvanized wire mainly includes the following steps:
1. Raw material preparation: Use high-quality low-carbon steel wire rods as raw material.
2. Drawing and forming: Process the raw material into steel wire of the required diameter through the drawing process.
3. Pickling and rust removal: Pickle the drawn steel wire to remove rust and impurities on the surface to ensure the smooth surface of the steel wire. This step is crucial for the subsequent galvanizing process because it can directly affect the adhesion and quality of the galvanized layer.
4. Washing and drying: The pickled steel wire needs to be fully washed to remove the residual acid and dried to prevent the influence of moisture on the subsequent process.
5. Hot-dip galvanizing or electro galvanizing:
Hot-dip galvanizing: Immerse the dried steel wire in molten zinc liquid to form a uniform galvanized layer on the surface of the steel wire through a chemical reaction. This step requires strict control of the temperature of the zinc liquid and the immersion time to ensure the quality and thickness of the galvanized layer.
Electro galvanizing (cold galvanizing): The zinc is gradually plated on the metal surface through the unidirectional current in the electroplating tank. The production speed is slow, but the coating is uniform, the thickness is thin, usually only 3-15 microns and the appearance is bright.
6. Cooling and purification: The galvanized steel wire needs to be cooled and the impurities and residual zinc on the surface are removed through cleaning and other steps to ensure the purity and quality of the product.
7. Finished product inspection: The galvanized wire produced is strictly inspected, including appearance quality, size specifications, mechanical properties, zinc coating thickness, adhesion, etc., to ensure that the product meets the relevant standards and requirements.
