1. Definition:

A GI Coil is a rolled steel product that has been coated with zinc through a galvanization process. The primary purpose of the zinc coating is to provide protection against rust and corrosion, extending the life of the steel in various environments. GI Coils are produced in a coil form, which can be further processed into sheets, panels, or other forms as needed.

2. Production Process of GI Coils:

• Hot Rolled Steel Production: The base material for GI Coils is hot rolled steel, which is first produced by heating and rolling steel at high temperatures to create hot rolled coils.

• Cleaning and Preparation: The hot rolled coils are cleaned to remove any surface oxides, scale, or contaminants that may interfere with the galvanizing process.

• Galvanization: The cleaned coils are then coated with zinc through one of the following methods:

  • Hot-Dip Galvanizing: The coils are dipped into a bath of molten zinc, which adheres to the steel and forms a protective coating.
  • Electro-Galvanizing: Zinc is applied to the steel surface using an electroplating process, where zinc ions are deposited onto the steel through an electric current.

• Cooling and Inspection: After galvanization, the coated coils are cooled and inspected for quality and uniformity of the zinc coating.

• Slitting and Processing: GI Coils can be further processed into various shapes and sizes, such as sheets or strips, depending on the end-use requirements.