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Anodising is a complex process that electrically converts the aluminium surface and sub-surface to a columnar structure of aluminium oxide. The porous structure can then be sealed with various chemistries to add additional properties.

Anodised coatings are typically sealed to improve their corrosion protection that is filling or hydrating the pores in the columns, using either hot water, chromates or acetates. The columns can also be filled with an ultra-fine aqueous dispersion of PTFE, improving the friction and wear properties of the coating (Apticote 350), as well as its corrosion properties.

The most dense coatings are produced from pure aluminium alloys. The presence of alloying elements like copper and silicon produces macro-porosity in the coating, reducing its corrosion protection properties.

Poeton offer a wide variety of anodising techniques, with each being tailored to provide different properties.

Conversion coatings are primarily used to reduce the corrosion effect on aluminium. They also form an ideal surface for paints to bond to. They can therefore be used in the painted or un-painted condition.

Conversion coatings produce a surface film through a chemical reaction with the substrate, which essentially converts the surface. If coatings and paint systems are applied to an aluminium surface with no prior surface conversion, the paint adhesion will be poor and paint may flake off.

Typical conversion coatings like Alocrom or Alodine contain Hexavalent chrome, which means they continue to protect the substrate material even if the paint layer is breached. However, under the new REACH regulations the use of hexavalent conversion coatings is coming to an end. Therefore, Poeton has invested a huge amount of R&D resource over the last 7 years evaluating and perfecting the application methods of the Alocrom alternatives, such as: Surtec 650, Iridite NCP, Socomore TCS PACS and Lanthane.

With 10 paint spray booths across 3 sites, a variety of pre-treatment and masking techniques and dedicated curing ovens, Poeton Industries can provide a comprehensive painting services. Poeton offers a wide range of paint systems to various defence standards, such as DEF-STAN, MIL-SPEC, as well as a multitude of aerospace approvals, such as Airbus, SAFRAN, Triumph and Collins Aerospace.

Poeton pride themselves on the quality of their paint finish, which can be attributed to the first-class equipment and extensive training. All our paint sprayers are fully trained to exacting standards, allowing us to paint the most complex of geometries.

We stock a wide range of paint systems, which can be applied to a variety of substrate materials. Our Technical Sales and R&D teams are on hand to assist in paint recommendations and specification interpretation.