Aluminium profile finishing

For more than four decades, Constellium has been transforming semi-finished products into prefabricated components.

Aluminium anodizing

Our plant in Nuits-Saint-Georges (France) has three anodizing lines capable of treating profiles of up to 8.4 meters long.

Anodizing is a specific surface treatment for aluminium whereby an electrolytic process is used to create a uniform and resistant surface layer of aluminium oxide. This coating gives a very attractive satin finish to the product and can be performed with an optional coloring process.

The complex anodizing process involves a series of soaking tanks and successive rinsing processes. It consists of four main process steps: 

    Surface preparation
    Forming of a coating of anhydrous alumina
    An optional coloring process
    Final sealing of the anodic layer

Our anodizing process complies with the Qualanod quality standards for anodic oxide coatings. Our anodizing lines are capable of treating profiles up to 7 meters long.

Aluminium machining services


In addition to extrusion and surface treatment operations, our machining workshops and network of sub-contractors offer a wide variety of finishing services.

By delivering parts that are in an advanced stage of finishing or ready-to-use parts, we help customers optimize their own production processes and cycle times.

Finishing expertise

Constellium’s soft alloys plants in Germany offer expertise in finishing. These include:


    Mechanical processing on computer numerical controlled (CNC) machining centers
    Drilling, milling and sampling
    Bending (up to a profile length of 15 meters)
    Thermal break
    Surface finishing (anodizing and powder-coating)

Other options are available on request, provided either in-house or with long-standing and experienced local partners.


In addition to manufacturing extrusions, Constellium’s soft alloys plants have more than 40 years’ experience in transforming semi-finished products into prefabricated components.

Last update 16 September 2014