Difference between aluminized zinc steel plate and galvanized steel plate

Compared with the hot-dip galvanized coating and the aluminized zinc aluminum alloy, the physical properties should be active, so there is a large gap in corrosion resistance. The test under the same outdoor standard shows that the service life of aluminum zinc plated sheet is more than four times that of hot-dip galvanized sheet.



The structure of the aluminum zinc alloy material of the aluminum zinc plated steel plate is composed of 55% aluminum, 43.4% zinc and 1.6% silicon, which are dried and solidified at a high temperature of 600 ℃. Its overall structure is composed of aluminum iron silicon zinc, which produces close quaternary crystallization, and then produces a strong and reasonable barrier to avoid the penetration of etching factors.



Features of aluminum zinc plated steel plate:



Corrosion resistance:



The corrosion resistance of "55% aluminum zinc plated steel coil" comes from the protective effect of aluminum barrier layer and the sacrificial protective function of zinc. When zinc is used for sacrificial protection in trimming, scratching and coating abrasion, aluminum will produce an insoluble metal oxide layer, giving full play to the role of barrier protection. Al Zn coated carbon steel coil has been exposed to various ambient air for more than 20 years. It is confirmed that the edge cutting protection effect of 55% Al Zn coated steel plate is better than that of hot-dip galvanized steel plate and 5% Al Zn coated steel plate.



Temperature resistance:



The temperature resistance of 55% Al Zn alloy steel plate is better than that of hot-dip galvanized steel plate, which is similar to that of aluminum coated steel plate. Aluminized zinc aluminum alloy steel plate can be used for high temperature natural environment up to 315 ℃.



Reflection:



The steel plate coated with 55% aluminum zinc alloy has a relatively high transmittance, making it a heat-resistant barrier; The thermal transmittance of the aluminized zinc steel plate is almost twice that of the hot-dip galvanized steel plate. Therefore, making roofs and panels without painting can also achieve the practical effect of energy conservation and environmental protection.



Paintability:



Because the zinc layer of the aluminized zinc steel plate has good adhesion with the paint, when it is used as a sign board for general main purposes, it can be painted without preparatory treatment and weathering layer solution; However, the hot-dip galvanized steel sheet must be treated with weathered layer and prepared.



Main uses of aluminum zinc plated steel plate:



According to different wall thickness specifications and models, the scope of application of aluminum zinc plated steel plate includes: distribution box (the thickness is 1.2-2mm); Solar water heater (0.32mm); Anti prying door plate; Side plate of household appliances;



Hot dip galvanizing is generally used for steel strip or steel wire (stranding). The surface of stainless steel plate is coated with zinc layer to isolate the corrosion of the air, so as to avoid the re erosion of the wall or materials, and ensure the service life of the wall or materials. And zinc is more cheerful than iron. In the case of etching, the zinc layer can also be sacrificed to protect the steel substrate.

Aluminized zinc has stronger protective effect and corrosion resistance than hot-dip galvanized products. All structures are made of aluminum iron silicon zinc, which produces close quaternary crystals. This junction crystal creates a barrier on the steel plate, so it is reasonable to avoid the penetration of etching factors. Corrosion resistance comes from the protective effect of aluminum barrier layer and the sacrificial protective function of zinc. When zinc is used for sacrificial protection in the cut edge, scratch and scratched part of the coating, aluminum will produce an insoluble metal oxide layer, giving full play to the barrier protection.