ã€China Aluminum Industry Network】Aluminum-coated zinc plate is also called galvanized steel plate. Its aluminum-zinc alloy structure is composed of 55% aluminum, 43.4% zinc and 1.6% silicon cured at a high temperature of 600°C. Its entire structure consists of aluminum. - Iron-silicon-zinc, which forms a fine quaternary crystal, then constitutes a barrier that effectively prevents penetration of corrosion factors.
Galvanized steel features:
1. Corrosion resistance:
The corrosion resistance of "55% Al-Zn coated steel coil" comes from the maintenance function of the aluminum barrier layer and the dedication of zinc. When zinc is dedicated to trimming, scratches, and scratches on the coating, aluminum forms an insoluble oxide layer that acts as a barrier to maintenance. Al-Zn alloy steel coils have been subjected to more than 20 years of outdoor exposure experiments in a variety of different atmospheric environments, proving that the trimming maintenance function of 55% aluminum-zinc steel plate is better than 5% aluminum-zinc steel plate.
2. Heat resistance:
The heat resistance of plated 55% aluminum-zinc alloy steel plate is better than that of galvanized steel plate, and the high temperature oxidation resistance of aluminum plated steel plate is similar. Al-Zn alloy steel plate can be used in high temperature environment up to 315 degrees.
3. Reflectivity:
Plated 55% aluminum-zinc alloy steel plate has a high reflectivity, making it a heat-resistant barrier; galvanized steel plate almost doubles the heat reflectance of galvanized steel plate, thus, it is used as a roof without painting. And panels can also achieve energy savings.
4. Paintability:
Because the galvanized steel sheet has excellent adhesion between the zinc layer and the paint, it can be used as a symbolic plate for normal use. It can be painted without pretreatment and weathering treatment; while the galvanized steel sheet requires weathering treatment and pretreatment .
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