PPGI is pre-painted galvanised iron, also known as pre-coated steel, coil coated steel, color coated steel etc., typically with a hot dip zinc coated steel substrate.

The term is an extension of GI which is a traditional abbreviation for Galvanized Iron. Today the term GI typically refers to essentially pure zinc (>99%) continuously hot dip coated steel, as opposed to batch dip processes. PPGI refers to factory pre-painted zinc coated steel, where the steel is painted before forming, as opposed to post painting which occurs after forming.

The hot dip metallic coating process is also used to manufacture steel sheet and coil with coatings of aluminium, or alloy coatings of zinc/aluminium, zinc/iron and zinc/aluminium/magnesium which may also be factory pre-painted. While GI may sometimes be used as a collective term for various hot dip metallic coated steels, it more precisely refers only to zinc coated steel. Similarly, PPGI may sometimes be used as a general term for a range of metallic coated steels that have been pre-painted, but more often refers more precisely to pre-painted zinc coated steel.

Zinc coated steel substrate for PPGI is typically produced on a continuous galvanizing line (CGL). The CGL may include a painting section after the hot dip galvanising section, or more commonly the metallic coated substrate in coil form is processed on a separate continuous paint line (CPL). Metallic coated steel is cleaned, pre-treated, applied with various layers of organic coatings which can be paints, vinyl dispersions, or laminates. The continuous process used to apply these coatings is often referred to as Coil Coating.

The steel thus produced in this process is a prepainted, prefinished and ready for further processing into finished products or components. to use material.

PPGI 

The uses of color-coated coils mainly include the construction industry, furniture industry, transportation industry, advertising industry, electrical appliance industry, etc. 12

Color-coated coils, full name color-coated steel plates, are a kind of product with hot-dip galvanized plate, hot-dip aluminum-zinc plate, electro-galvanized plate, etc. as the substrate. After surface pretreatment, one or several layers of organic coatings are applied on the surface, and then baked and cured. Because its surface is coated with organic coatings of various colors, it is named color-coated coils. This material is lightweight, beautiful, has good corrosion resistance, and can be directly processed, so it is widely used in many fields.

Construction industry: Color-coated coils are widely used in the construction industry, including roofs, roof structures, rolling doors, kiosks, blinds, guard doors, street waiting rooms, ventilation ducts, etc. These applications show the diversity and practicality of color-coated coils in the construction field.

Furniture industry: Color-coated coils are also used in the furniture industry, such as refrigerators, air conditioners, electronic stoves, washing machine shells, oil stoves, etc. Its lightweight and beautiful characteristics make it an ideal choice for furniture manufacturing.

Transportation: In the transportation industry, color-coated coils are used for automobile ceilings, backboards, hoardings, car shells, tractors, ship bulkheads, etc. These applications reflect the role of color-coated coils in improving the durability and aesthetics of transportation vehicles.

Advertising: Color-coated coils are very suitable for use in the advertising industry due to their variety of colors and surface treatments. They can imitate the appearance of wood, stone or other materials while maintaining the strength and durability of steel.

Electrical industry: Color-coated coils are also used for internal and external components in the electrical industry, such as dashboards, panels and seat frames. Their light weight and corrosion resistance make them ideal for this application.

In addition, color-coated coils are also lightweight, beautiful and have good corrosion resistance. They can be directly processed. The colors are generally divided into gray, sea blue, brick red, etc., and are mainly used in the advertising industry, construction industry, home appliance industry, electrical industry, furniture industry and transportation industry. Depending on the use environment, users can choose suitable coatings, such as polyester silicon modified polyester, polyvinyl chloride plastisol, polyvinylidene chloride, etc.