Painted aluminum roofing sheet encompass A3003 and A3004. Both alloys fall on 3000 collection Al-Mn institution, also known as an anti-rust series. As a matter of reality, aluminium receives rusty, too, only in a distinctive way from iron. The rusting length proves to be a oxidation method of metals. In different words, a metal reacts to the oxygen in the air and an oxide fabric comes into being. Because of the truth that maximum oxide materials are powder like, the rusting system is usually regarded as a symbol of decaying for maximum metals, that is deadly for a roofing cloth. But, aluminium is an exception. It’s now not that it does not reacts to the oxygen. It’s so energetic in chemical homes that a skinny layer of oxide aluminium seems on the sheet surface within days. But the oxide is company and dense in place of loose and powder like. It features as a unique protective layer preventing oxygen from similarly invading of the sheet. What’s greater, it does now not reacts to many corrosive substances. That’s why aluminium is known as an anti-rust metallic. The advantage of 3003 and 3004 alloys over pure aluminium lies in their content of Manganese, an inactive metallic that does not react to the oxygen. The participation of Mn in addition complements the corrosion resistance of the alloys. This proves to be one of the most essential reasons why 3003 and 3004 aluminium sheets are selected as a roofing material.
The natural corrosion resistance of 3003 and 3004, but, aren't enough to resist long-time period weather situations in various regions, in particular in rainy and coastal cities. This stimulates the improvement of painted aluminium sheets of the two alloys. The paints consist of PE, PVDF and PU, with PVDF the maximum durable and most powerful in weather resistance. Huawei 3003 3004 painted aluminum sheet for roofing has a coating thickness of 25um and above, even as different companies have their very own thickness scope. The overall thickness of the sheet stages from zero.6mm to at least one.2mm, and width 55mm to 1600mm. All RAL shades are to be had. Welcome to contact us for a charge!