Technical coatings | BWB Surface Technology

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

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.

#Mechanical engineering

Anodized coating protects Sigrist optical measuring instruments

Due to the diverse areas of application of Sigrist measuring instruments, they must be constructed from robust and durable components. The aluminum components are therefore extramatt anodized at BWB and colored blue or black depending on the area of application.

#Medical technology

Successfully completed audit in medical technology

The FCA would like to express its sincere thanks to all the people involved for their support before and during the audit – thank you for the great team effort.

#Medical technology

Pure brilliance for medical technology

Since the spring of 2020, BWB-Ampho has been offering innovative plasma polishing. The order volume exceeded expectations after commissioning of the plasma polishing system.

#Aviation

Europe-wide aviation competence

BWB again passed the demanding NADCAP certification in Switzerland, Germany and Romania with top marks and demonstrated the highest aviation competence.

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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.