Color Coated Steel Coil: Characteristics, Types, Application and more

color coated steel coil has a wide range of uses across industries. It is mainly used in buildings, automobiles, home appliances, solar energy devices, furniture, etc. In home appliances, the sheets made from these steel coils are mainly used as the side door plate for refrigerators, freezers, air conditioners, and washing machines.

What is a color-coated steel coil?

A steel coil that is coated with decorative paint on both sides is known as a color-coated steel coil. Steel coils commonly feature polymer coating in various colors and matte, lustre or decorative natural finish. The color coating protects it from atmospheric corrosion while giving it more strength and durability. Also known as pre-painted steel, color coated steel is made by putting a steel sheet through surface pre-treatment, then coating for one or more layers, and finally baking and cooling.

How are color-coated steel coils made?

Most times galvanised coils are used to produce color coated steel coils. Usually, paint is applied after giving the hot-rolled and cold-rolled steel coils a metallic coating. Given below are the steps used to produce color coated steel coils:

Step 1: Unwinding/paying of the steel coil into sheets

Step 2: Pre-cleaning the surface of the sheet

Step 3: Levelling the sheet

Step 4: Treating the sheet with chemicals and de-oiling

Step 5: Applying the steel primer

Step 6: Curing/drying the primer in an oven

Step 7: Applying the paint coat (on one or both sides, dipping into a bath or using a roll method)

Step 8: Curing/drying the coat in an oven

Step 9: Cooling the sheet

Step 10: Recoiling into color-coated steel coil