Due to an electrochemical process, aluminium can be treated with anodization and the surface will be transformed into an extremely hard and scratch-resistant layer of aluminium oxide. This layer will protect the aluminium from direct mechanical impact and it is weather- and corrosion resistant. Vibrant colours, solidity, long durability and an excellent protection from environmental influences are just some of the advantages to this surface. The scope of using this material is manifold: architecture, superstructure work, and so on.
Aluminium surfaces can be pretreated chemically or mechanically before they get anodised. This changes their structure, their reflex properties and the optical effects of the surface. The state of the basic material as it has been achieved by means of the pretreatment remains visible on the finished surface.
The pretreatment processes that we offer
E0 = no pretreatment
E1 = sanded (for sections only)
E2 = brushed (for sections only)
E4 = sanded, micro-polished (for sections only)
E6 = chemically pretreated (pickled)
Thanks to different colouring processes, many colour shades can be obtained. We use special anodizing colours that are adapted to the anodized layer and yield a characteristic appearance.
The effects of the colour and the overall impact result from the alloy used, the kind of the mechanical pretreatment and the kind of process applied for the coating of the surface. When the layering is applied, it is necessary to make some samples showing the limits within a certain range of the application.
The Sandalor® procedure describes a method of colouring on anodized aluminium that combines the advantages of aluminium oxide layers with a wide colour range. When dyed with Sandalor®, the pigments will bond with the pores of the non-organic anodized layer and will end up in closure of a compaction process. Due to this process, the various, light resistant and outdoor suited colours will enable very pretty, metallic and colourful surfaces by maintaining the original aluminium characters. The colouration has shown high resistance in long-term outdoor-exposure inspections. Furthermore, Sandalor® is labelled with mature process technology and superior quality.
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When wet-coated, the aluminium components will be laminated in the factory and subsequently the varnish will be burned-in in the stoving oven. Compared to general powder-coatings, a liquid varnish will be used. The range of design possibilities such as colours and effects (like metallic effects or micaceous iron ore) is tremendous in this process. Virtually any surface can be designed individually in each possible shade. In addition to that, wet-coating systems show an obvious greater impression of depth than common coatings, especially when using metallic effects.
In contrast to powder coating, building elements are coated with liquid colours and receive a burning afterwards in our ultra-modern plants.
Chromate coating – in order to guarantee a proper paint adhesion and corrosion protection, the surface will be cleaned and coated with an aluminium chromate layer.
Chromate-free pretreatment or the fear of Filiform-corrosion:
Pre-anodization – by using pre-anodization you will achieve the utmost corrosion protection. When there is industrial atmosphere at the installation site, it is located close to coastal areas or due to other expected exposure of chloride, there has to be fulfilled a pre-anodization in order to avoid a possible filiform-corrosion.
DURAFLON® can be produced in almost any colour. The decision for some colour shade usually follows standard colour charts (RAL, NCS, Sikkens, and others). The technology enables brilliant metallic effects with depth effect and various gloss grades from matt to glossy.
DURAFLON® is a supremely weatherproof and virtually maintenance-free stove enameling method on wet-coating basis. Compare to other lacquer-systems, Duraflon® does not become chalky and will keep its optical- and technical functions throughout the entire service life of the facade. Through a substantially lower expense that contributes to the preservation of the decorative look, the running costs will be re-duced permanently. Cleaning at longer intervals, the easy-to-clean technology, quality, durability and resistance are just some of the ad-vantages regarding this lacquer-system.