Aluminium passivation Surtec 650

Trattamento della Passivazione - Nicasil ZEP


In this case, the aluminium details are treated with the passivation process to prepare the surface for subsequent painting. This procedure is applicable to all types of aluminium alloys, especially in the case of small parts and carpentry up to 3 meters.

The passivation treatment has two purposes: the first is to favor the anchoring of the layer of paint that will be applied to the aluminium sheet, the second to significantly improve its resistance to corrosion.

The trivalent chromium-based aluminium passivation replaces the traditional chromating with hexavalent chromium of the aluminium, in accordance with European environmental standards (ROhS etc.).

Characteristics of aluminium passivation

In general, passivating the metal surface makes it possible to obtain good resistance to corrosion, as well as excellent adhesion as a pre-painting layer and preservation of the electrical properties of the part.

Passivation is often preferred to other treatments due to its characteristics as an electrical conductor, or because it is capable of binding tenaciously to the metal surface. Finally, for its particular porosity which makes it ideal as a pre-painting protective layer.

This procedure is applicable to all types of aluminum alloys, in particular to small parts and carpentry up to 3.5 meters in length.

Furthermore, a treatment method is studied which can also lead to the creation of specific frames for each type of shape. This study is carried out according to the shape of the object to be treated, taking into account the edges, any welds and surface activation. In some cases, in fact, a preventive shot peening with microspheres is necessary. The manufacturing procedure is conducted with reference to internal standards.

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