Passivation & chromating

Passivation is the creation of non-metallic protective layers on a metallic material to prevent oxygen corrosion. BWB offers passivation of aluminium, stainless steel, as well as previously galvanized steel (blue passivation).
Chromating refers to the formation of a chromate layer. These inorganic, non-metallic protective coatings are passivation coatings and are mainly used in the aviation industry.

Range of services
Treatments
Datasheets
Contact

Market specific certifications

Passivations and chromatings are very popular in the electronics industry because of the low surface resistance. They are used in the aerospace industry because of their excellent corrosion protection and serve as ideal adhesion primers for paints.
BWB meets the uncompromising quality requirements of the aerospace industry when chromating aluminium, as confirmed by the EN 9100 and Nadcap certifications.

Approvals & certificates

Conversion coatings on aluminium

Chromating

Bonderite M-CR 1200 AERO, Bonderite M-CR 1200 S AERO and M-CR Alumigold are processes for chromating aluminium components in the aerospace industry. They produce robust and durable anti-corrosion coatings that withstand the high demands of aviation.

Cr(VI)-free passivation

SurTec 650 is a chromium(III)-containing passivation which meets the complex requirement profile of aviation. SurTec 650 passivation has low surface resistance, high corrosion protection and excellent paint adhesion and meets the requirements of the REACH regulation.

Chromium-free passivation

With Bonderite 160 and Bonderite 400, BWB offers two chromium-free passivations for aluminium. These are environmentally friendly alternatives to conventional chromium-containing treatment processes.

Passivation of steels

Passivation of steels after prior galvanising refers to the process of treating galvanized steel to further improve its corrosion resistance. This is done by forming a thin, protective passive layer on the surface of the galvanised steel. This passive layer protects the zinc layer from corrosion (white rust) and thus improves durability.

Passivation of stainless steel

Passivation of stainless steel is a chemical process that creates a thin and protective layer on the surface of the metal. Passivation is an important step in the manufacturing of stainless steel products to increase their durability and resistance to corrosive environments.

Performance overview passivations

Locations

Altenrhein

800 x 400 x 500 mm

Stans-Oberdorf

920 x 400 x 1100 mm

Locations

Niederwangen

750 x 500 x 900 mm

Stans-Oberdorf

3100 x 400 x 1100 mm

Locations

Altenrhein

2000 x 500 x 1500 mm

Dresden

5000 x 800 x 1800 mm

Stans-Oberdorf

3100 x 400 x 1100 mm

Location

Dresden

5000 x 800 x 1800 mm

Location

Stans-Oberdorf

3100 x 400 x 1100 mm

Locations

Altenrhein

3400 x 700 x 1400 mm

Dresden

1400 x 560 x 800 mm

Stans-Oberdorf

3100 x 400 x 1100 mm

Location

Dresden

1400 x 560 x 800 mm

Locations

La Chaux-de-Fonds

450 x 300 x 450 mm

Dresden

1400 x 560 x 800 mm

Rudolfstetten

1100 x 550 x 700 mm

Location

La Chaux-de-Fonds

450 x 300 x 450 mm

Location

La Chaux-de-Fonds

450 x 300 x 450 mm

Locations

La Chaux-de-Fonds

450 x 300 x 450 mm

Dresden

3700 x 700 x 1000 mm

Location

Rudolfstetten

1000 x 350 x 700 mm

Product data sheets

Chromating & passivation of aluminium

Stainless steel passivation

Markets

By proving market-specific certificates for aviation (Nadcap, EN 9100) and medical technology (ISO 13485) as well as the implementation of the necessary quality management systems (ISO 9001), BWB proves to be a reliable partner in the industry.

Aviation

Mechanical engineering

Medical technology