The biggest difference between the galvanized sheet and the aluminum-plated zinc sheet is the difference in the coating. The surface of the galvanized sheet is evenly distributed with a layer of zinc material that acts as an anode protection for the parent material, that is to say, the alternative corrosion protection of the zinc material In order to use the base material, only when the zinc is completely corroded can the base material inside be damaged.
The surface coating of aluminum-plated zinc plate is composed of 55% aluminum and 43.5% zinc and a small amount of other elements. The aluminum-zinc coated surface is a honeycomb structure under the microscopic structure. 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 cut edge will soon rust if the cut edge is basically lost of protection. Therefore, the aluminum-plated zinc plate should be cut as little as possible. Once cut, apply the anti-rust paint or zinc-rich paint to protect the edge to make the life of the plate. extend.
The surface of the aluminum-zinc plate is more fancy than that of the galvanized plate, and the price of the aluminum-zinc plate is more expensive than the expensive small zinc flower of the galvanized plate than the large zinc flower.
The surface of aluminum-zinc-plated steel plate is uniquely smooth, flat and gorgeous star flower, the basic color is silver white to make it have excellent corrosion resistance. The normal service life of the aluminum-plated zinc plate can reach 25a. The heat resistance is very good. It can be used in a high temperature environment of 315 ℃. The adhesion between the coating and the paint film is good. It has good processing properties. it is good.
The composition of the coating layer is composed of 55% aluminum, 43.4% zinc, and 1.6% silicon in weight ratio. The production process of aluminum-galvanized steel sheet is very similar to the production process of galvanized steel sheet. It is a continuous fusion coating process. And color-coated products have excellent adhesion and flexibility.
Aluminum-zinc plate has high heat reflectance which is twice that of galvanized steel plate, we can use it as heat insulation material. Aluminum-plated zinc plate also has good heat resistance, can withstand high temperatures of more than 300 degrees Celsius, very similar to the high-temperature oxidation resistance of aluminum-plated steel plate, often used in chimney halls, ovens, illuminators and fluorescent lampshades. Because the density of 55% AL-Zn is lower than that of Zn, under the same weight and the same thickness of the gold plating layer.
