Aluminum die-casting alloy suitable for anodic oxidation treatment and preparation method thereof

Abstract

The invention discloses an aluminum die-casting alloy suitable for anodic oxidation treatment, which comprises the following components in percentage by weight: 11-13% of Si, 0-0.1% of Cu, 0-0.1% of Mg, 0-0.1% of Zn, 0.8-1.0% of Fe, 0-0.5% of Mn and the balance of AL. The aluminum die-casting alloy suitable for anodic oxidation treatment, which is disclosed by the invention, has the advantages of simple anodic oxidation, good oxidation effect, thick film layer and uniform color and luster, and the invention can overcome the defects of the prior art.

Description

technical field

[0001] The invention relates to an aluminum alloy, in particular to a die-casting aluminum alloy suitable for anodic oxidation treatment and a preparation method thereof. Background technique

[0002] The surface of aluminum and its alloys is easy to form a layer of extremely thin aluminum oxide film (thickness is about 0.01 ~ 0.02um), which has a certain corrosion resistance in the atmosphere. But because this layer of oxide film is amorphous, it makes the surface of the aluminum part lose its original luster. In addition, the oxide film is loose, porous, uneven, not strong in corrosion resistance, and easily stained. Therefore, aluminum and its alloy products usually need to be anodized.

[0003] After anodic oxidation treatment, the surface of aluminum and its alloys can obtain a dense film layer (from tens of microns or even hundreds of microns) that is much thicker than the natural oxide film. After this layer of artificial oxide film is sealed, the a...