The difference between galvanized sheets and galvalume sheets lies in the coating. A layer of zinc material is evenly distributed on the surface of the galvanized sheet to provide anode protection for the base metal. In other words, the alternating corrosion of the zinc material protects the base metal. Only when the zinc corrodes completely can the base material be damaged.
The surface coating of aluminum-zinc plate is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. Microscopically, the surface of the aluminum-zinc coating has a honeycomb structure, and the "honeycomb" composed of aluminum contains zinc. In this case, the aluminum-zinc coating also plays the role of anode protection, but on the one hand due to the reduction in zinc content, and on the other hand because the zinc material is wrapped in aluminum and is not easy to electrolyze, the role of anode protection is greatly reduced. Therefore, once the aluminum-zinc plate is cut, it will rust quickly when the cutting edge is basically lost. Therefore, aluminum-zinc plates should be cut as little as possible. Only after the cut edges are protected with anti-rust paint or zinc-rich paint can the service life of the plate be extended.
The surface of galvanized sheet is more beautiful than galvanized sheet. At the same time, the price of galvanized sheets is more expensive than that of galvanized sheets, and the price of small zinc flowers is more expensive than that of large zinc flowers.
