The core structure of an aluminum sheet is a metal substrate primarily composed of aluminum or aluminum alloy. The substrate determines the strength, ductility, and corrosion resistance of the aluminum sheet. Pure aluminum sheets are soft and ductile, facilitating processing and shaping; while aluminum alloy sheets, through the addition of alloying elements such as magnesium, manganese, silicon, and zinc, enhance the material's strength, hardness, and durability, enabling it to withstand higher mechanical stresses and complex operating environments.
A dense oxide film naturally forms on the surface of the aluminum sheet, which is crucial for its corrosion resistance. This oxide film prevents direct corrosion of the metal substrate by air, moisture, and chemicals, thus extending the aluminum sheet's service life. For aluminum sheets requiring special decorative effects or functional protection, surface properties can be further enhanced through processes such as anodizing, spraying, and coating.
The internal metallic crystalline structure of the aluminum sheet endows it with good strength and toughness, making it less prone to cracking or deformation during processing. Depending on the application, aluminum sheets can be hot-rolled or cold-rolled to achieve different thicknesses and hardness levels to meet the rigidity and stability requirements of materials in construction, industry, transportation, and other fields. A well-designed core structure ensures the reliability of the aluminum plate in terms of load-bearing capacity, processing, and use.