Features of low-quality aluminum alloy door and window profiles
Release time：2024-05-29 09:44
Features of low-quality aluminum alloy door and window profiles
1, the national code rules building aluminum oxide film thickness should not be less than 10um (micron). The thickness is not enough, the appearance of aluminum profile is easy to rust and corrode. In the sampling inspection, some aluminum profiles without production name, factory site, consumption permit and certificate of approval have an oxide film thickness of only 2 to 4um, and some even have no oxide film. According to the expert budget, for every 1um oxide film thickness reduction, the power consumption cost per ton of profile can be reduced by more than 150 yuan.
2. Inferior aluminum profiles greatly reduce the blocking time, reduce the loss of chemical reagents, and reduce the cost, but the corrosion resistance of the profiles is also greatly reduced.
3. Unqualified chemical composition. Mixed with a large number of miscellaneous aluminum, aluminum aluminum can greatly reduce the cost, but will lead to the construction of aluminum chemical composition is not qualified, seriously endanger the construction project safety.
4. Reduce the wall thickness of the profile. 90 series sliding window type, according to the national standard, its aluminum wall thickness * * is not less than 1.4mm, some Guangdong products only 0.6 to 0.7mm. 46 series of ground bounce door type, the national standard use of aluminum wall thickness * * low not less than 1.62mm, sampling inspection, some products in Guangdong only 0.97 to 1.18mm.
recommend News
2024-05-29