Many users choose the 7075 aluminum plate, because they do not know how to judge the quality of the quality, they often suffer from the deception of the business, resulting in the purchase of inferior products. American Airlines technicians will introduce the methods to identify inferior quality and see what characteristics are inferior aluminum profiles.
1. The chemical constituent elements are unqualified, and some unqualified inferior miscellaneous aluminum and aluminum scrap are doped in the aluminum plate, because this will greatly reduce the cost, resulting in unqualified chemical composition of the aluminum profile, which will seriously endanger safety.
2. Many businesses attempt to reduce the loss of chemical reagents on aluminum sheets and reduce the cost by reducing the sealing time of aluminum sheets. However, the corrosion resistance of such aluminum sheets is greatly reduced and the quality of products is degraded.
3, the merchant reduces the thickness of the oxide film, thereby reducing production costs. Our country stipulates that the thickness of the aluminum oxide film should be greater than 10 microns. If the thickness is not enough, the surface of the aluminum plate is easily corroded and corroded. For every 1 micron reduction in oxide film thickness, the cost per ton of aluminum plate can be reduced by 150 yuan.
We must clearly know that an unqualified 7075 aluminum sheet profile is more corrosive by air, rain, sunlight, etc. during use, which greatly accelerates the deformation speed of the 7075 aluminum sheet profile and the service life of the product. Will be greatly reduced. Therefore, we must pay attention to the selection of quality products when choosing products.