Technical coatings protect against abrasion and corrosion.

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.

References

#Anodising

Anodized colors with maximum reproducibility

With its color palette for industrial design, BWB offers a standard selection of 27 anodized colors that are always available at the Grosshöchstetten site. In addition, three new colors in the spectrums titanium, blue and green are now available at the Altenrhein site.

Direkte Identifikation in der Präzisionsautomatik

#Mechanical engineering

Minimalist design as a distinguishing feature

Jenny Science AG from Rain in Lucerne has the components of its linear and hollow shaft motors refined at BWB in Grosshöchstetten. Here you can find out more about their leading innovation, perfect technology and minimalist design.

Medizintechnik BWB-Ampho Hartlöten Brasage

#Medical technology

High-quality, filigree soldered connection

Brazing under inert gas is a high-quality brazing technique used in the watch industry and medical technology for joining particularly high-quality metals such as gold, platinum, stainless steel and titanium.

Ematal beschichtete Hydraulikzylinder der GRIBI Hydraulics AG

#Mechanical engineering

High-quality Ematal layer for continuous use in agriculture

Hydraulic systems play an important role in increasing productivity and efficiency in agriculture. Ematal-coated components from BWB Surface Technology decisively protect and extend the service life of hydraulic solutions.

Farbeloxierte Komponenten des Multiphotonenmikroskop in BWB-Rot 251

#Mechanical engineering

All-round package for high-tech microscope

The instrument cover for a high-tech microscope receives an all-round package in the range of services offered by BWB Surface Technology.

#Ematal anodising

Maximum performance, minimum wear

Over the past 10 years, therefore, more than 1.5 million valve components have been ematalized by BWB-Betschart AG in Schlieren.

#Electroplating

“Welcome aboard” is the motto in Rudolfstetten

At BWB, the pirates among the surface technicians are the Rudolfstetter. With the galvanic processes, they form the exotics within the Swiss plants of BWB.

#Aviation

Oversize hard anodizing

How do the coating properties of Permalux differ from those of commercially available hard anodized coatings? The BWB laboratory has investigated this question and subjected the surfaces of customer components to an endurance test.

Discover more

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.

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.

Electroplating

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.

Passivation & chromating

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.