Technical coatings

Surface coatings play a key role in the technical industry to reliably protect metal components against abrasion, corrosion and wear and to significantly extend their service life. In addition, technical coatings offer advantages such as improved electrical conductivity, optimised surface hardness and an attractive appearance for metal components. BWB is one of the leading providers of high-performance coating processes and offers solutions such as Harteloxal, Ematal and Heloxal - tailor-made for demanding industrial applications.

Dimensionally stable coating – precision despite protective coating

The application of protective coatings inevitably leads to an increase in component size. In order to maintain precise tolerances, the increase is either neutralized by targeted chemical removal or already taken into account during mechanical processing. Thanks to dimensionally accurate coating, the dimensions of the components remain reliably within the predefined tolerance ranges.

Hard anodising – for maximum durability

Hard anodising, also known as hard anodising, enables the creation of extremely resistant surfaces on aluminium components. The use of high currents and temperatures close to freezing point results in a surface hardness of up to 550 HV (Vickers hardness). This coating increases abrasion resistance and significantly extends the service life of the components.

Ematalising – Minimal friction for precise applications

The Ematal process is particularly suitable for applications where friction must be reduced, whether through mechanical contact (e.g. plain bearings) or through flowing media (e.g. valve housings and nozzles for gases or liquids). In pneumatics and hydraulics in particular, Ematal ensures optimum performance with minimum wear.

Oversized anodising – for XXL aluminium components

BWB Surface Technology offers anodising of particularly large aluminium components. With a weight of up to 2 tons, a length of 22 meters and a height and width of 2.2 x 1.3 meters, even oversized components are coated efficiently and precisely.

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Technical coating processes

Anodising and hard anodising

When aluminium is anodised, the top layer is transformed into a robust oxide layer. This layer provides reliable protection against wear and corrosion and at the same time improves the surface hardness. In addition to classic anodising, BWB’s range of services also includes specialised processes such as hard anodising, Ematal and Heloxal.

Chemical nickel plating

Electroplating processes not only protect metal components from wear and corrosion, but also optimise their electrical and thermal conductivity. Electroless nickel plating produces hard, non-magnetic and solderable layers that are particularly impressive in applications with high technical requirements.

Passivation and chromating

Passivation and chromating refers to the application of a non-metallic protective layer that prevents oxygen corrosion and extends the service life of metallic materials. In addition to classic chromating with Alodine 1200 S Aero, the BWB Group also offers Cr(VI)-free alternatives such as SurTec 650 and Bonderite M-NT 400 – for environmentally friendly and future-oriented applications.

Certified quality leader

The continuous striving for improvement is reflected in the quality of BWB. Numerous certifications such as NADCAP (CP/SE/NDT), EN 9100 and ISO 13485 confirm the high quality of BWB services for technically applications in aviation, mechanical engineering and medical technology.

Aviation

Mechanical engineering

Medical technology