Types of Color Coated Steel Coil
Different substrates can be used for color-coated steel. And cold-rolled sheets, galvanized sheets, and galvalume sheets are commonly used.
1. Color Cold Rolled Steel Coil
The color-coated coil, with cold-rolled steel as its base metal, has a smooth and attractive appearance. And it maintains the processing performance of cold-rolled steel. However, cold-rolled steel is prone to rusting when there are any minor scratches on the surface. Hence, color cold-rolled steel products are only recommended for indoor applications with low requirements.
2. Prepainted Galvanized Steel Coil (PPGI Coil)
The most popular type of color-coated steel uses galvanized steel as its base metal, including both hot-dip galvanized sheets and electro-galvanized sheets. Hot-dip galvanized steel is particularly favored as a base material. These prepainted galvanized steel coils are protected from rusting by a layer of zinc and organic coatings. Hence, its service life is longer than that of the hot-dip galvanized sheet. Despite this, due to their smooth surface and attractive appearance, they are widely used for interior decoration, steel furniture, home appliances, and other similar applications. The zinc thickness of the hot-dip galvanized substrate ranges from 30 g/㎡ (double-sided) to 275 g/㎡. You can choose according to the use environments.
3. Electro-galvanized Color-coated Steel
Color coated steel is also made using electro-galvanized sheets as the substrate. However, the zinc layer on the electro-galvanized sheet is typically thin, with a range of 10-30 g/㎡, making it unsuitable for use in exterior wall or roof panels. Despite this limitation, electro-galvanized color coated steel is valued for its attractive appearance and outstanding processing performance, making it a popular choice for home appliances, steel furniture, interior decoration, and other applications.
4. Colour Coated Galvalume Coil (PPGL Coil)
You can also find color coated steel coil with galvalume steel (55% Al-Zn alloy coating) as