The manufacturing process of galvanized steel mainly includes steel preparation, galvanizing treatment and subsequent processing. The following are the detailed steps:

1. Steel preparation

Steel selection: Select suitable steel according to needs, such as low carbon steel.

Surface treatment: Remove the oxide scale and rust on the surface of the steel by pickling to ensure the surface is clean.

2. Galvanizing treatment

Hot-dip galvanizing:

Preheating: Preheat the steel to about 120°C to remove moisture.

Immerse in zinc liquid: Immerse the steel in molten zinc liquid at about 450°C.

Reaction: The surface of the steel reacts with zinc to form a zinc-iron alloy layer.

Cooling: Take out the steel and cool it to solidify the zinc layer.

Electrogalvanizing:

Electrolyte preparation: Prepare an electrolyte containing zinc ions.

Electroplating: Use the steel as the cathode, and zinc ions are deposited on the surface after power is applied.

Cleaning and drying: Clean and dry the steel after electroplating.

3. Subsequent processing

Surface treatment: Passivation, oiling and other treatments are carried out as needed to enhance corrosion resistance.

Cutting and forming: Cut or process the galvanized steel into the required shape and size.

Quality inspection: Check the thickness, adhesion and surface quality of the galvanized layer to ensure compliance with the standards.

4. Packaging and transportation

Packaging: Use moisture-proof and rust-proof packaging materials.

Transportation: Prevent collision and moisture during transportation to ensure the product is intact.

Summary

The manufacturing process of galvanized steel includes steel preparation, galvanizing and subsequent processing, and each link needs to be strictly controlled to ensure the quality and performance of the final product.