1.Brief introduction of PPGI
Zinc coated steel substrate for Pre painted galvanized steel plates(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.The coil coating process may be used for other substrates such as aluminium, or aluminium, stainless steel or alloy coated steel other than "pure" zinc coated steel. However, only "pure" zinc coated steel is typically referred to as PPGI.
2.Feature of Pre painted galvanized steel plates (PPGI)
Color steel sheets are available in a wide range of colors, sizes and mechanical characteristics. The broad selection of color, ﬁnish, texture, gloss, and hardness, expands the creativity of designers for building exteriors, interior decorations, household appliances, and so on. Color steel sheets can be ﬁlm-embossed or metal-embossed, giving the ﬁnish a ﬁne texture.
3.Base plate of Pre painted galvanized steel plates(PPGI)
The substrate of color steel sheets, a hot-dip metallic coated cold-rolled steel sheet, is heat treated in a continuous annealing furnace. It is available in drawing, extra deep drawing, and lock forming grades. The tightly controlled hot-dip process minimizes the formation of the brittle zinc-iron alloy layer, thus ensuring a ﬁrmly adhering zinc layer which does not peel during forming. The color coatings are durable and ﬂexible.
4.Advantages of Color steel sheets
Color steel sheets are easy to use and have no need for post-painting, thus eliminating the need to invest in expensive labor, painting equipment, and pollution abatement costs. The extra durability of color steel sheets against corrosion and weathering imparts a lasting application life and noticeably reduces maintenance costs. In the long term, these features produce signiﬁcant savings for end users.
5.Mechanical properties of Color steel sheets
Color steel sheets use specially selected hot-dip metallic coated steel as a substrate. The metallic coating retards oxidation of the base steel metal. The paints utilized in color steel sheets are specially selected in accordance with the processing methods and the end use. The 2 coat 2 bake method of paint application provides color steel sheets with extra resistance against abrasion, impact, chemical corrosion, and weathering.
6.Productive process of PPGI