How does aluminum profile distinguish inferior products?

1. Extrusion defects.

Due to the completeness of the extrusion equipment, the maturity of the extrusion process and the improper operation during the extrusion of aluminum profiles, defects such as bubbles, inclusions, layering, color difference, and distortion will occur, which will affect the quality of the aluminum profiles.

2. 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 even have no oxide film. According to experts' estimates, for every reduction of 1um oxide film thickness, each ton of profile can reduce electricity consumption costs by more than 150 yuan.

3. 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 construction projects.

4. Reduce the wall thickness of the profile.

For the 90 series sliding window type, according to the national standard, the wall thickness of the aluminum profile is not less than 1.4mm, and some products are only 0.6 to 0.7mm. For 46 series of floor bullet doors, the wall thickness of the aluminum profile used in the national standard is not less than 1.62mm. During the random inspection, some products are only 0.97 to 1.18mm.

5. Inferior aluminum profiles greatly reduce the closing time.

The loss of chemical reagents is reduced, the cost is reduced, but the corrosion resistance of the profile is also greatly reduced.