Oxide layer with relatively thin thickness (max. 25 microns).

The protective power of oxide coating can be significantly increased through the electrolytic process of anode oxidation, best known as anodization, which basically consists in an artificial increase of the protective oxide layer thickness. The objects to treat must be complete with every mechanical machining and finishing prior to treatment, and the surfaces must be previously cleaned and properly prepared.

Then, the pieces are connected to the anode of an electrolytic cell containing a diluted solution of sulphuric acid. In this way, the surface of the aluminum detail is attacked, thus obtaining a significant increase of the oxide layer thickness and the ensuing increase of its effectiveness.

Therefore, with this type of treatment it is possible to obtain characteristics of isolation or resistance to wear. Moreover, as we operate in a water solution, the anode produces aluminum hydroxide, which is a very porous material with high absorption capacity; this can be used to impregnate the detail surface with coloring materials.

After dehydration, bonding, washing and drying, we have an oxide layer highly resistant to corrosion and highly adherent thanks to a very “irregular” surface of the surface oxide.

We can also pre-treat details with a process of electro-polishing.

Complying with standard MIL-A-8625 TP 2