Eloksallı alüminyum bobinlerin rolü nedir??
Alüminyum bobinler ve alüminyum alaşımları havada oksitlenir. Tabii ki, alüminyumun yüzeyinde oluşan oksit film amorf bir yapıya sahiptir., Bu, alüminyum metalin yüzeyinin orijinal parlaklığını kaybetmesine neden olur., Bu saf doğal oksit film tabakası, alüminyum metalin yüzeyini biraz Pasivasyon yapacaktır., ama çok ince, about 4-5nm, and has large porosity and poor physical properties. It cannot effectively prevent further corrosion of aluminum metal by various substances in the air.
Örneğin, 1050 alüminyum bobin is treated by anodic oxidation, which can make the surface of aluminum and aluminum alloy get a high-density film layer (from tens of microns to hundreds of microns) that is much thicker than the natural oxide film.
This layer of man-made oxide film is closed again, and the oxide film with no crystal structure is converted into an oxide film of modified epoxy resin, and the porosity is also closed, so that the gloss of the metal surface will not change for a long time, and the anti-corrosion properties , the impact toughness is gradually improved, and the appearance of decorative art can also be obtained after coloring. Because aluminum and metal products have many characteristics after anodizing, the aluminum anodizing process is widely used in the surface treatment of metal aluminum.