
Blackening
Black oxide treatment of steel components with minimal dimensional change
A conversion coating that creates a thin black surface layer on steel components. PBS provides blackening services for a uniform black appearance with minimal dimensional change, ideal for precision parts. Components up to 1200 × 600 × 350 mm can be processed.
Dimensional stability
Corrosion protection
Non-reflective surface
Industrial applications
Max. dimensions of parts:
1200 x 650 x 350 mm
Surface treatment
Properties
Applications & Use
Surface treatment
Blackening (black oxide)
Properties
Layer Thickness: ~0,5-2,0 µm. Decorative finish with limited corrosion resistance. Black to blue-black surface finish.
Applications & Use
Defence, arms, optics industry - Firearm components, optical devices, tools and machine parts requiring a black appearance.
Additional services offered

Expert Consulting
- Recommendation and selection of suitable technology
- Component fixturing
- Masking of holes and threads
- Increased product value through surface optimization
Automated Production Line
- Consistent results for every project
- High capacity and time efficiency
- Computer-controlled line with process cycle data logging for repeatable quality in both small batches and serial production

In-House Testing Laboratory
- Non-destructive testing
- Rapid prototyping
- Corrosion control
- Abrasion
- Metallography
- Material composition analysis (X-ray)
In-House Research and Development (R&D)
- 40+ years of know-how and experience
- High-precision components
- Minimal scrap rate (0.4%)

Standards and Certifications
- NADCAP – Non-destructive testing (PT, RT)
- ISO 9001, ISO 14001, AS 9100