By combining the sacrificial anode of zinc and the protection layer of aluminum, it permanently maintains the strength and durability of the steel plates.
The corrosion resistance of the aluminum zinc alloy plated steel plate is derived from the sacrificial anode of zinc and the protective layer of aluminum. While zinc provides sacrificial protection in areas where there are cuts and scratches, aluminum forms an insoluble oxidized layer, providing a protective barrier.
The outdoor exposure test of the aluminum zinc alloy plated steel plates has been performed for over 20 years in different atmospheric environments. This type of testing has shown the longevity of the aluminum zinc alloy plated steel plates, 2 to 5 times over other galvanized steel plates of the same plating thickness. At the same time, this provides proof for the all-side protection of the alloy-plated steel plates, which is superior to galvanized- and aluminum-plated steel plates.
With the accelerated corrosion test with salt-water spray, humidity test with 100% relative humidity and water submersion test, it is shown that the corrosion resistance of the aluminum zinc alloy plated steel plates is much higher than galvanized steel plates.
The heat resistance of the aluminum zinc alloy-plated steel plates is better than galvanized steel plate, with similar high-temperature anti-oxidation resistance characteristics of aluminum-plated steel plate.
The alloy-plated steel plate can be used in high temperature environment up to 315℃, without contamination or change of color, whereas galvanized steel plate is not suitable to be used in environments over 230 o C.
In high temperature, the alloy-plated steel plate exhibits similar anti-rust and anti-oxidation characteristics to aluminum-plated steel plates.
HEAT TRANSMISSION AND REFLECTIVITY
The high reflectivity of the aluminum zinc alloy plated steel plate makes it a barrier that is heat resistant, which is something galvanized steel plates and rock wool panels cannot do.
At a temperature as high as 370oC, only aluminum-plated steel plates can compare to the heat reflectivity of the alloy-plated steel plate.
The formability of the aluminum zinc alloy-plated steel plate is similar to other plated steel plates, which is greatly affected by the raw material of the steel plate, the technology and equipment. While the alloy plating is harder than that of galvanized steel plates, it has a superb adhesiveness to steel plates. As long as the instructions are followed in regard to the minimum bending radius and the use of lubricant, it is guaranteed that the same formability of galvanized steel plate can be achieved.
The aluminum zinc alloy-plated steel plates have the tendency to adhere to the equipment; therefore, the correct application of lubricant has become the most important part of the forming process. Solvent lubricant that does not leave any residue should be used, and water soluble lubricant should be avoided. Apply the correct lubricant evenly on both sides of the steel plate using wool rugs or rollers before formation to create a lubricating membrane.