Types of polymer coatings for flat rolled steel

Enamels and primers based on polymer resins or plastics are used as paint materials for application on rolled stock surface:

Polyester coatings (PE) are popular due to their low cost and good formability. PE has average consumer properties and is widely used for applications without high performance requirements.

Polyurethane (PUR) coatings are premium grade; they are resistant to damage and UV radiation. PUR is best suited for products exposed to abundance of sunlight and regular mechanical action such as washing/scrubbing with detergents.

Polyvinylidene fluoride (PVDF) are considered premium coatings. They demonstrate excellent corrosion resistance even in aggressive environments, which is why they are perfect for use in coastal regions and chemical industry applications.

Polyvinylidene Difluoride (PVF2) coatings are PVDF-based and possess PVDF’s best qualities — and then some. PVF2 coatings are resistant to high temperatures and even more resistant to corrosion than PVDF. They are recommended for use in very hot and aggressive environments.

Polyvinyl chloride (PVC; plastisole) coatings are the thickest ones. They are strong and durable, cold proof and resistant to corrosion even in aggressive environments. PVC-coated products are intended for rough weather conditions or applications where they are subjected to direct exposure to seawater or chemicals.

COMPARATIVE CHARACTERISTICS OF POLYMER COATINGS OF FLAT ROLLED STOCK