The difference between galvanized steel coil and gavalume steel coil

Gavalume steel coil is an alloy material, which has aluminum so it has a lot of corrosion resistance, high temperature resistance can withstand high temperatures above three Baidu, and the density is small, so it can be stamped, sheared, welded, etc., the surface conductivity is good . However, there are many steel coils in the market, galvanized steel coils and aluminum-plated zinc steel coils, many people will be confused, so what is the difference between the two? Let's discuss together:

The difference between the galvanized steel coil and the aluminum-plated zinc steel coil is mainly the difference in the coating. A layer of zinc material is evenly distributed on the surface of the galvanized steel coil, which plays an anode protection role on the parent material, that is to say, the alternative corrosion protection of the zinc material In order to use the base metal, only when the zinc corrosion is completed can the base metal be damaged.

 The surface coating of the gavalume steel coil is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. Under the microscopic surface, the aluminum-zinc coated surface has a honeycomb structure, and the "honeycomb" made of aluminum contains zinc. In this case, although the aluminum-zinc coating also plays the role of anode protection, on the one hand, due to the reduction of zinc content, on the one hand, because the zinc material is wrapped in aluminum, it is not easy to electrolyze, so the role of anode protection is greatly reduced. The zinc plate is cut, and it will quickly rust when the cut edge is basically lost of protection. Therefore, the aluminum-plated zinc plate should be cut as little as possible. Once the edge is cut, an anti-rust paint or zinc-rich paint should be used to protect the edge. The service life of the board is extended.

The surface of the galvanized aluminum plate is more beautiful than that of the galvanized plate. At the same time, the price of the galvanized aluminum plate is more expensive than the galvanized plate. The price of the small zinc flower is more expensive than the large zinc flower.

In cities with humid air and rainy water, once a certain point of the aluminum-zinc plate is corroded, if the measures are not taken in time, the slowly corroded area will become larger and even the entire panel surface; while the galvanized plate is not corroded even at a certain point Will spread.

The surface of aluminum-plated zinc steel plate is smooth, flat and gorgeous star flower, the base color is silver white. The coating structure makes it have excellent corrosion resistance. The normal service life of galvalume steel coil can reach 25a, good heat resistance, and can be used in a high temperature environment of 315℃; the adhesion between the coating and the paint film is good, and it has good processing performance, which can be stamped, sheared, welded, etc.; surface Good conductivity.