PPGI refers to pre-painted galvanized iron, which is also known as pre-coated steel, coil-coated steel, color-coated steel, and other terms. It typically uses a hot-dip galvanized steel substrate. The term PPGI is an extension of GI, which is the traditional abbreviation for Galvanized Iron. Galvanizing provides cathodic and barrier protection to the base steel. The paint coating acts as a barrier, significantly reducing the corrosion rate of the zinc coating.

Galvanized steel (PPGI) is fully coated with zinc, while Galvalume steel (PPGL) is coated with aluminum, zinc, and a small amount of silicone. This combination provides superior corrosion resistance and durability compared to typical galvanized coatings.

 PPGI coils find primary applications in the automotive and construction industries. They are commonly used in the manufacturing of building materials such as roof panels, roof tiles, sandwich panels, and more.