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Anodising 
aluminium

Anodizing aluminum is one of the ways your custom profile can be finished. We do not provide this service ourselves. The anodizing is carried out at the factory where your profile is produced. Are you looking for anodized aluminum profiles? Read on or contact us for more information.

Contact Dalupo
35-min

How does anodising work?

To create the oxide layer on the aluminum profile, it is immersed in a sulfuric acid bath. An electric current is then passed through the bath, releasing pure oxygen. The oxygen reacts with the aluminum, forming the oxide layer.

Because sulfuric acid is a strong acid that can attack aluminum, the profile is thoroughly and extensively rinsed after the acid bath. This ensures that all sulfuric acid is removed from the aluminum.

The oxide layer is still porous at this stage. Therefore, it is sealed after rinsing. The pores in the aluminum are closed during this sealing process, making the profile highly resistant to corrosion.

61-min

Depending on the treatment, the thickness of the oxide layer may vary. The anodized layer is built up from the aluminum itself. This means that part of the layer is on top of the aluminum, and part of it is within the aluminum surface.

The advantage of this is that, for example, a powder coating can adhere well to the anodized layer.

68-min

Clamping points

To anodize a product, clamping points are required. These are points where the aluminum can be held during the anodizing process. Profiles can usually be clamped at the ends. It is necessary to indicate visible sides. You must also mark holes or sides that must not be used for clamping.

You can choose whether the profiles are supplied with hanging holes or whether the ends should be cut off.

40-min
36-min

Horizontaal én verticaal anodiseren

Normaal gesproken worden profielen horizontaal geanodiseerd. Dit geldt ook voor poedercoaten. Bij grote en/of stevige profielen werkt dit goed. Deze kun je namelijk met behulp van klemmen aan de uiteinden vastmaken. Bij hele kleine profielen is dat lastiger, omdat deze van zichzelf niet stevig genoeg zijn om alleen aan de uiteinden vastgemaakt te worden. Daarom is er bij horizontaal anodiseren halverwege een extra ophangpunt nodig, omdat het materiaal anders gaat doorhangen. Dit ophangpunt blijft altijd zichtbaar als het profiel geanodiseerd is.

Daarom bieden wij ook de mogelijkheid aan om je aluminium profiel verticaal te anodiseren. Bij verticaal anodiseren omzeil je het probleem van het extra hangpunt. 

Geanodiseerde profielen bestellen

Our anodized aluminum profiles are produced on request in factories that carry the Qualanod quality mark. Qualanod is a European quality standard for anodized aluminum. Several of the factories we work with comply with the Qualanod requirements and are certified with the Qualanod certificate.

Horizontaal anodiseren