Electrolytic process that forms an oxide of a specific thickness on the aluminum alloy, which gives the aluminum not only the natural color of aluminum, but also a range of colors achieved by electrolytic colouring, which ranges from champagne to black, passing through the bronze colours.
We hold the European Qualanod certification.
This is an electrolytic process which forms an oxide coating of a determined thickness over the aluminium alloy. In products with a decorated surface of the aluminium profiles, two sub-treatments are commonly used:
- Polished (resulting from a mechanical treatment);
- Brushed (resulting from a chemical treatment).
This process not only gives the profiles the natural colour of the aluminium, but also a spectrum of colours achieved through electrolytic colouring, which ranges from champagne to black, passing through the bronze colours.
For aluminium profiles for architecture, the conditions for the realisation and quality of this treatment are based on directives and standards which the products should respect. To this effect the entity, Qualanod, exists in Europe to manage the equally named quality branding and certify manufacturers (with the participation of national inspection entities – in the case of Portugal, LNEC) so that they may present their brand for quality recognition.
Extrusal, with this certificate (No 1405) since 1983, ensures the fulfilment of the Qualanod directives and the observance of the following standards: NP 1482, NP 1480, NP 2908 and NP 2907.
Surface treatments classification:
- I) Class 10 µm - Designed for indoor applications;
- II) Class 15 µm - Designed for the architectural aluminum profile;
- III) Class 20 µm - Recommended for architectural aluminum profiles inserted in aggressive environments;
- IV) Class 25 µm - Recommended for architectural aluminum profiles inserted in very aggressive environments.
| APPLICATION |
SEVERETY OF THE ENVIRONMENT |
CLASS (µm) |
| INTERIOR |
LOW |
10 |
| EXTERIOR |
AVERAGE |
15 |
| |
HIGH |
25 |
| |
VERY HIGH |
25 |