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Content archived on 2024-05-07

Development and testing of a new coloring process for aluminium oxi de layers

Objective



In order to increase the corrosion resistance and to obtain a decorative effect, the oxide layer of aluminium and its alloys can be intensified by chemical and electrochemical processes. This oxide layer can be coloured, using different procedures, in order to obtain a decorative effect. The demand on coloured oxide layers in the architecture and the automobile industry is that they be light fastness and resistant to weathering and provide a suffficient corrosion protection of the layers. However for the colouring procedures until now only a very limited palett of colours exists which are furthermore often not light-fast and weathering-resistant. The new electrolytic colouring procedure with organic, cationic dyes to be developed and tested within this project will offer for the first time the possibility to colour anodized aluminium with the complete spectrum of colours, hues, shades and brightness; these coloured layers are light-fast, weathering-resistant and abrasion-resistant (since the pigments are deposited at the bottom of the pores of the anodic oxide layer where they are protected against weathering and abrasion). Aluminium oxide layers which can fulfill these requirements will contribute to making coloured oxide layers attractive again for the market. Above all, by an attractive colouring, the acceptance and the sales of aluminium products would increase. By this means, the business results of the branch can be favourably influenced, especially the competitiveness with regard to countries having low wages. The testing of the procedures ensues in laboratory and field experiments. A colouring procedure which meets the demands of the market would mean a considerable advantage in competition for the small and medium-sized enterprises within Europe. The results will be carried over into the elaboration of new regulations and into the revisions of national and international norms.

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Programme(s)

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Topic(s)

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Funding Scheme

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CRS - Cooperative research contracts

Coordinator

Alcon Aluminium Consult GmbH
EU contribution
No data
Address
71,Benrather Schlossallé 71
40597 Düsseldorf
Germany

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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

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Participants (6)

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