Inferior aluminum profiles mixed with scrap aluminum have four major characteristics

by:Zeyi     2022-01-17
Unqualified aluminum alloy doors and windows, when used, will cause deformation of the aluminum profile due to the influence of sunlight, air, rain, etc., and even cause the glass to break and fall off. Inferior aluminum profiles have the following four characteristics: 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. The chemical composition is unqualified. The aluminum profile mixed with a large amount of miscellaneous aluminum and scrap aluminum can greatly reduce the cost, but it will cause the chemical composition of the building aluminum profile to be unqualified, and seriously endanger the safety of the construction project. Reduce the wall thickness of the profile. For the 90 series sliding window type, according to the national standard, the minimum wall thickness of aluminum profile is not less than 1.4mm, and some Guangdong products are only 0.6 to 0.7mm. For 46 series of floor bomb doors, the minimum wall thickness of the aluminum profile used in the national standard is not less than 1.62mm. During the random inspection, some products in Guangdong are only 0.97 to 1.18mm. 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. ————The article comes from the Internet. If there is any infringement, please contact to delete it.
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