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Top 5 Tips for Preparing Galvanized Steel Coil


Galvanized steel coil is a welded steel plate with a hot-dip or electroplated zinc layer on the surface. It is generally widely used in construction, home appliances, vehicles and ships, container manufacturing, mechanical and electrical industries, etc.

Galvanized steel coil is also known as galvanized iron or GI steel coil. Galvanized steel coil is produced by passing cold rolled steel sheet through a molten zinc bath. The zinc coating provides corrosion resistance by acting as a protective barrier between the steel and the environment.

Galvanized steel Coil are divided into ordinary electrolytic plates and fingerprint-resistant electrolytic plates. The fingerprint-resistant board is based on the ordinary electrolytic board and adds a fingerprint-resistant treatment, which can resist sweat. It is generally used on parts that do not undergo any treatment. The grade is SECC-N. Ordinary electrolytic plates are divided into phosphating plates and passivation plates. Phosphating is more commonly used, and the brand name is SECC-P, commonly known as p material. Passivation plates are available with or without oil.

Galvanized steel coil is produced according to ASTM A653  – The American Standard For Cold Rolled Materials.

Galvanized Steel Sheet & Coil Material Types

  • Commercial Steel (CS Types A, B, and C)
  • Forming Steel (FS Types A and B)
  • Deep Drawing Steel (DDS Types A and C)
  • Extra Deep Drawing Steel (EDDS)
  • Structural Steel (SS) – further designated by Grades (33,37,40,50,80)
  • High Strength Low Alloy Steel (HSLAS)

There are 5 tips to prepare galvanized steel coils?

1. Clean the surface: Before preparing galvanized steel coils, it is important to clean the surface thoroughly. Use a mild detergent or a specialized cleaner to remove any dirt, grease, or oil from the surface. This will ensure proper adhesion of any coatings or paints applied later.

2. Remove any rust or corrosion: Galvanized steel is known for its corrosion resistance, but over time, it may develop rust or corrosion in certain areas. Use a wire brush or sandpaper to remove any rust or corrosion from the surface. This will help in achieving a smooth and even finish.

3. Apply a primer: Applying a primer is essential for enhancing the adhesion of any subsequent coatings or paints. Choose a primer specifically designed for galvanized steel and apply it evenly to the surface. Allow the primer to dry completely before proceeding with the next steps.

4. Choose the right coating or paint: Depending on the intended use and environment, select an appropriate coating or paint for the galvanized steel coils. Consider factors such as durability, weather resistance, and aesthetic appeal. Follow the manufacturer’s instructions for application, including the recommended number of coats and drying times.

5. Proper storage and handling: Once the galvanized steel coils are prepared, it is crucial to store and handle them correctly to maintain their quality. Store them in a clean, dry, and well-ventilated area to prevent moisture and corrosion. Use proper lifting equipment to avoid damage during transportation.

Top Metal Manufacture is a supplier of steel materials like aluminum sheet, Aluminum strip, aluminum coils, aluminum plate, aluminum checkered plate and carbon steel plate.

Top Metal Manufacture also sell cold rolled steel coils, SPCC, SGCC, Galvalume steel coils, Aluzinc steel coils, prepainted Galvanized steel coil, PPGI and we can sell Non Grain oriented steel or CRNGO. We have products copper plate, alloy steel bar or Tungsten carbide materials available too.

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