Galvanized Roofing Sheet

Akzo Hot Dip Corrugated Galvanized Iron Sheet BWG 34 Corrugated Zinc Sheet

What is the difference between galvanized roofing sheet and color coated roofing sheet?
The substrate of the color coated roofing sheet is galvanized sheet or galvanized. A color coating is plated on the basic foundation to achieve the effect of waterproof and anti-corrosion. The price of color coated roofing sheet is generally determined according to the thickness you want to buy, the brand and the amount you want, and it changes every day with the price of steel. Galvanized roofing sheet have basically the same life as color steel roofing sheet. color coated roofing sheet are made of galvanized sheets and then coated with color paint. Galvanized sheet generally has a thicker zinc layer, about 10um or more, with strong anti-corrosion ability. So it is a commonly used galvanizing process. The cold galvanized is very thin, about 3-5um, the hot-dip galvanized surface is rough and bright, with zinc spangles in severe cases, and the electroplating is smooth and dark (stained). The galvanized steel sheet produced by the electroplating method has good processing properties. Chemical industry generally has more cold galvanized sheets, which are suitable for small parts; hot-dip galvanized sheets are generally used for electrical equipment and components, and are suitable for large parts and equipment. Hot-dip galvanized sheet and cold galvanized sheet are fundamentally different in the structure of the coating. ”

Which of galvanized sheet and color steel sheet is not easy to rust?
Color steel plate is less likely to rust.

Color steel plates include hot-dip galvanized color steel plates and general color-coated steel plates. The former does not require special attention to the peeling of the coating (polyester paint) during processing. The latter requires special attention, as the coating peels off and rusts easily.
Color steel plate is less likely to rust.

In order to prevent the surface of the steel plate from being corroded and prolong its service life, the galvanized steel plate is coated with a layer of metal zinc. This zinc-coated steel plate is called a galvanized steel plate. It is customary to call coated steel sheets color coated steel sheets. And because the coating is carried out before the steel plate is formed, it is called a pre-coated steel plate in foreign countries.