The surface of the aluminum zinc plated steel plate presents a unique smooth, flat and gorgeous star, and the basic color is silver white. The special coating structure makes it have excellent corrosion resistance. The normal service life of the aluminized zinc plate can reach 25a, and the heat resistance is very good, which can be used in the high temperature environment of 315 ℃; The coating has good adhesion with the paint film, has good processing performance, and can be punched, sheared, welded, etc; The surface conductivity is very good.
The coating is composed of 55% aluminum, 43.4% zinc and 1.6% silicon according to weight ratio. The production process of aluminum zinc plated steel sheet is similar to that of zinc plated steel sheet and aluminum plated steel sheet. It is a continuous molten coating process. When both sides are exposed to the same environment, the aluminum zinc plated steel sheet with 55% aluminum zinc alloy coating has better corrosion resistance than the galvanized steel sheet with the same thickness. The aluminum zinc plated steel plate with 55% aluminum zinc alloy coating not only has good corrosion resistance, but also has excellent adhesion and flexibility.
characteristic:
1. Thermal reflectance:
The thermal reflectivity of the aluminum zinc plated steel plate is very high, twice that of the zinc plated steel plate. People often use it as a thermal insulation material.
2. Heat resistance:
Aluminum zinc alloy steel plate has good heat resistance and can withstand the high temperature of more than 300 degrees Celsius. It is similar to the high temperature oxidation resistance of aluminized steel plate and is often used in chimney tubes, ovens, illuminators and fluorescent lampshades. Corrosion resistance:
The corrosion resistance of aluminum zinc coated steel coil is mainly due to the protection function of aluminum. When zinc is worn, aluminum forms a dense layer of aluminum oxide, which prevents corrosion resistant materials from further corroding the interior.
3. Economy:
Since the density of 55% AL Zn is smaller than that of Zn, under the condition of the same weight and the same thickness of the gold coating, the area of the aluminum zinc plated steel plate is more than 3% larger than that of the zinc plated steel plate.
4. Easy to paint
The aluminum zinc plated plate has excellent adhesion with the paint, and can be painted without pre-treatment and weathering treatment.
The paint adhesion of the gold plating layer of the aluminum zinc plated steel plate is excellent, so it can also be directly coated on the advertising board and general plates without the pretreatment such as Weathering.
5. The aluminized zinc steel plate has a silver white gorgeous surface.
6. The aluminum zinc plated steel plate and the galvanized steel plate have similar processing performance and spraying performance.
Application:
Buildings: roofs, walls, garages, sound insulation walls, pipes, modular houses, etc
Automobile: muffler, exhaust pipe, wiper accessories, fuel tank, truck box, etc
Household appliances: refrigerator backplane, gas stove, air conditioner, electronic microwave oven, LCD frame, CRT explosion-proof belt, LED backlight, electrical cabinet, etc. Agriculture: pig house, chicken house, granary, greenhouse pipes, etc
Others: heat insulation cover, heat exchanger, dryer, water heater, etc.
Difference between galvanized sheet and aluminized zinc sheet:
The difference between galvanized sheet and aluminized zinc sheet mainly lies in the difference of coating. A layer of zinc material is evenly distributed on the surface of galvanized sheet, which plays the role of anode protection for the base metal. That is to say, the alternative corrosion of zinc material protects the use of the base metal. Only when the zinc is completely corroded can the base metal inside be damaged.
The surface coating of aluminum zinc plated plate is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. In the micro level, the surface of aluminum zinc plated coating is honeycomb structure, and the “honeycomb” composed of aluminum contains zinc. In this case, although the aluminum zinc plated coating also plays the role of anode protection, on the one hand, the role of anode protection is greatly reduced due to the reduction of zinc content, on the other hand, the zinc material is not easy to electrolyze because it is wrapped by aluminum, Therefore, once the aluminized zinc plate is cut, it will rust quickly when the cut edge is basically lost of protection. Therefore, the aluminized zinc plate should be cut as little as possible. Once the cut edge is protected by antirust paint or zinc rich paint, the service life of the plate can be extended.
Post time: Dec-16-2022