Anodizing

Extrugasa has three anodizing plants full automatic with an installed power of 124,000 amps, and a production capacity over 11.000 square metres a day. The modern installations, unique in Spain, where the control over different dips is absolutely meticulous, allows us to give the product a uniformity in texture and colour which few plants in the world are able to offer.

The aluminium oxidation gives rise to a compound of high hardness, an oxide coat, called alumina. This one, contrary to other usual iron oxides, is strongly fused with the aluminium subtract and not only it does not remove but also it has an additional function:To protect the aluminium that it covers. Due to the fast aluminium oxidation in contact with atmosphere and taking into account the fact that that oxide-alumina- is, at the same time its better protection against inclement weather, we can also say that aluminium has an automatic and natural mechanism of defence liable to the contact with air. However, the alumina coat got spontaneously is not a sufficient protection for profile applications. To obtain the appropriate thickness of the protective coat, aluminium is subjected to an electrochemical process called anodizing. This process consist of making electricity pass through the profile, while it is submersed in a solution of acid or basic pH, so that aluminium oxidation can be accelerated and increased. Similarly, during the anodizing process you can give colour to the aluminium.