Aluminum profiles are divided into high-quality aluminum profiles
and inferior aluminum profiles. Among them, the characteristics of inferior aluminum profiles are: 1. The chemical composition is unqualified, and a large amount of miscellaneous aluminum and scrap aluminum are mixed in the product. The cost of aluminum profiles is greatly reduced, but it will The chemical composition of the building aluminum profile is unqualified, which seriously endangers the safety of the construction project. 2. Inferior aluminum profiles greatly reduce the sealing time, reduce the loss of chemical reagents, and reduce costs, but the corrosion resistance of the profiles is also greatly reduced. 3. Thin oxide film thickness. 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 to 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 power consumption cost per ton of profile can be reduced by more than 150 yuan. Unqualified aluminum profiles will be deformed due to the influence of air, rain and sunlight when used, and even cause glass breakage and fall off.
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