Technical coatings

In the technical industry, surface coatings are of great importance to protect metal components from abrasion and corrosion and to increase their service life. In addition to the protection factor, technical coatings can also positively influence the electrical conductivity and appearance of metal components.
As a leading supplier of surface coatings, BWB is able to offer a wide range of electrolytic, galvanic and chemical coatings for almost all requirements and industries.

Dimensionally accurate coatings

The application of a protective layer leads to an increase in the size of the component. To ensure that the dimensions remain true to size, the increase must be neutralized by chemical erosion or already taken into account during mechanical processing. Tolerances agreed in advance can be maintained when coating to size.

Hard anodising for added durability

Hard anodising can produce very resistant surfaces on aluminium components. In contrast to normal anodising, this process uses high currents and temperatures around freezing point to achieve a particularly high Vickers hardness of up to 550 HV.

Hard anodising PTFE

For even better sliding properties, hard anodised parts can be additionally impregnated with PTFE. PTFE impregnation is often used in dry lubrication and in bearings and seals to minimize friction.

Ematal anodising

Ematal anodising is used when friction is to be minimized by mechanical contact (e.g. in plain bearings), by a flowing medium (e.g. valve housings and nozzles for gases or liquids) or a combination thereof (in pneumatics and hydraulics).

Oversize anodising

BWB Surface Technology anodises 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.


Technical coating processes

Anodise/hard anodise

When aluminium is anodised, the top layer is transformed into a robust oxide layer. The generated layer provides reliable protection against abrasion and corrosion. In addition to anodising, BWB’s range of services also includes special processes such as hard anodising, Ematal anodising and Heloxal hard anodising.

Chemical nickel plating

Electroplating processes are used to protect metal components from abrasion and corrosion and to influence electrical and thermal conductivity. Chemical nickel plating, for example, produces layers that are non-magnetic, solderable and very hard.

Passivation & chromating

Passivation or chromating is the application of a non-metallic protective layer to a metallic material to prevent oxygen corrosion. In addition to chromating with Alodine 1200 S Aero, BWB also offers Cr(VI)-free alternatives such as SurTec 650 and Bonderite M-NT 400.

Certified quality leader

The ongoing quest for improvement is reflected in the quality of the 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.


Mechanical engineering

Medical technology