Aluminum is divided into cooked aluminum and raw aluminum. The cooked aluminum is more than 98% aluminum, which is soft and can be rolled or punched. Raw aluminum is less than 98% aluminum, which is relatively brittle and hard, and can only be found in sand casting. So, how to distinguish inferior aluminum profile
s? There are roughly three points that can be distinguished: 1, the thickness of the oxide film is thin. National standards stipulate that the oxide film thickness of architectural aluminum profiles
should not be less than 10um (micrometers). If the thickness is not enough, the surface of the aluminum profile is easy to rust and corrode. In the random inspection, some aluminum profiles without production name, factory location, production license, and qualification certificate have an oxide film thickness of only 2-4um, and some do not even have an oxide film. According to experts' estimates, for every reduction in the thickness of the oxide film by 1um, the cost of electricity consumption per ton of profile can be reduced by about 150 yuan. 2. The chemical composition is unqualified, and the product is doped with a large amount of miscellaneous aluminum and scrap aluminum aluminum profiles, and the cost is greatly reduced. This will lead to the unqualified chemical composition of the building aluminum profile, which will seriously endanger the safety of the construction project. 3. Inferior aluminum profiles greatly reduce the sealing time, reduce the loss of chemical reagents, and reduce costs, but the corrosion resistance of aluminum profiles is also greatly reduced. In short, unqualified aluminum profiles will deform due to the influence of air, rain and sunlight when used, and even cause glass breakage and fall off.
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