The Relationship between Anodizing of Aluminum Alloy and Materials

Anodizing of aluminum alloys is a common surface treatment method, and the results of anodizing treatment on different types of aluminum alloys may also vary. Here are some examples to illustrate the characteristics of different aluminum alloy anodizing treatments:

After anodizing treatment of pure aluminum (A1100 and other high-purity aluminum), an oxide film with uniform thickness and high hardness can be obtained, and its surface gloss and brightness can be significantly improved.

2-series aluminum alloys, such as aluminum copper alloys and aluminum zinc alloys, can deepen the surface color after anodizing, while improving their hardness and corrosion resistance. This series of aluminum alloys, due to the presence of a large amount of other metal elements, will form a more beautiful, sturdy, and durable oxide film after anodizing treatment than pure aluminum.

6 series aluminum alloys, such as aluminum magnesium silicon alloys, can achieve different levels of rust and corrosion resistance after anodizing, and can also improve their radiation resistance. Due to the presence of magnesium, an active metal, in this series of aluminum alloys, acid cleaning is required before anodizing to remove impurities such as iron from the surface of the aluminum alloy.

Other aluminum alloys, such as the 7 series aluminum alloy, contain heavy metal elements such as zirconium and copper. When anodizing, attention should be paid to controlling multiple aspects such as voltage, temperature, and acid concentration in order to produce an oxide film with a certain thickness and uniformity.

In summary, after anodizing treatment, the thickness, hardness, color, and other characteristics of the oxide layer of different aluminum alloys will vary. It is necessary to carry out corresponding treatments according to the properties of the material to ensure that the obtained oxide film can meet both aesthetic and usability requirements.