Anodized

Anodizing, short for anodized aluminium surface, is a process in surface technology that is applied specifically to aluminium. This technique is used to create a protective oxide layer on the surface of aluminum parts. The term "anodizing" is derived from the term "electrolytic oxidation of aluminum", which illustrates the electrochemical nature of the process.

During the anodizing process, the aluminium part is placed as an anode in an electrolyte bath. This is often an acidic solution, usually sulphuric acid. The application of an electric current initiates oxidation on the surface of the aluminum. This leads to the formation of a stable oxide layer known as an anodized layer. This layer consists mainly of aluminium oxide and is characterized by hardness, wear resistance and a porous structure.

The pores in the anodized layer allow the penetration of dyes or other substances, which enables the application of colors or the improvement of corrosion resistance. The anodizing process can also be used to preserve the natural color of the aluminum.

Anodizing is used in various applications, including the manufacture of architectural components, jewelry, technical components and packaging materials. The resulting anodized layer not only improves the aesthetic properties of the aluminium surface, but also gives it additional protective properties and increased durability.