How to identify and distinguish the inferior aluminum profile and the poor aluminum profile four?
Third, the chemical composition is not qualified.Some manufacturers in order to retain customers, at the incorporation of a large number of miscellaneous scrap aluminum, aluminum can greatly reduce the cost, but will lead to industrial aluminum unqualified chemical compositions, seriously endanger the life of aluminum.Fourth, reduce the wall thickness of profiles.
The first price, whether manufacturers?.Poor quality of aluminum profileExtrusion defects. Is the extrusion process mature and suitable for operation?.Thin oxide film. Not less than 10um. Aluminum factory, production license, certificate of inspection.Unqualified chemical composition. The unqualified chemical composition seriously endangers the safety of building engineering.Reduce profile wall thickness. 90 series, the wall thickness is lower, not less than 1.4mm.
First, extrusion defects.Aluminum extrusion process for machine equipment is perfect, process technology is mature and whether the operation staff misconduct and other reasons, will lead to aluminum flakes, such as inclusion, delamination, chromatic aberration, distortion and other defects, affecting the quality of aluminum profiles.Second, the film thickness is thin.Industrial aluminum oxide film thickness standard should be not less than 10um (m). If the thickness is not enough, the surface of the aluminum profile is easy to rust and corrode and shorten the service life. In order to save the cost, the thickness of the oxide film is only 2 to 4um, and some even have no oxide film. It is estimated that each reduction of 1um film thickness can reduce power consumption by more than 150 yuan per ton.
