Aluminum surface oxidation and aluminum hard oxidation process difference?

Aluminum oxidation is also divided into two kinds: surface oxidation and hard oxidation. What is the difference between aluminum surface oxidation and hard oxidation of aluminum?

1. The chemical method of reaction between the two is different: hard oxidation of aluminum usually refers to sandblasting or shot peening, which is a physical method, mainly to adjust the mechanical properties of the surface structure, or to prepare equipment for the subsequent process. Anodizing is a chemical process.

2. Different electrical conductivity: the surface of aluminum is theoretically conductive when it is oxidized, but it is theoretically non-conductive when it is hardened and oxidized.

3. In the use of different occasions: aluminum surface oxidation is mainly suitable for decoration; And aluminum hardening oxidation is mainly functional, generally used for wear resistance and electric occasions.