Aluminium finishing
Hard Anodising
Hard anodising builds a thick, dense oxide layer integral to the aluminium itself, giving high wear resistance, surface hardness, and corrosion protection for parts that see friction, pressure, or harsh environments. Wear resistance can approach that of hardened steel while keeping aluminium's light weight. We process to BS ISO 10074 and your own customer specifications.
- Thickness
- 25–70 microns
- Standards
- BS ISO 10074
- Turnaround
- 5–7 working days
Process data
Available in natural or black, with a PTFE seal for lower friction. The oxide layer grows both into and out of the surface, so we allow for it on tight-tolerance features and can mask threads, bores, and contact faces.
| Materials | Aluminium alloys |
|---|---|
| Thickness | Typically 25–70 microns |
| Finishes | Natural bronze / grey, or black · PTFE seal available |
| Standards | BS ISO 10074, plus customer specifications |
| Turnaround | Typically 5–7 working days · 24-hour service on request |
| Typical uses | Motorsport, aerospace, hydraulic components, pneumatic systems, defence equipment, precision engineering |
Maximum part size
| Finish | Max weight | Max size (L × D × Br) |
|---|---|---|
| Natural | 35 kg | 1110 × 400 × 600 mm |
| Black | 35 kg | 1110 × 400 × 600 mm |
| Red | 15 kg | 400 × 400 × 600 mm |
| Blue | 15 kg | 600 × 300 × 600 mm |
| Orange | 15 kg | 400 × 400 × 600 mm |
| Gold | 15 kg | 400 × 400 × 600 mm |
| Titanium / grey | 15 kg | 400 × 400 × 600 mm |
Please note: because hard anodising produces a darker base finish, dyed colours appear deeper and more muted than the same colours on sulphuric anodising.
Frequently asked questions
- ISO 9001 certified
- Made in Britain member
- IMF member (Institute of Metal Finishing)
- Free Certificate of Conformity
- Fast turnaround: 3–7 days, 24-hour service on request
- 25+ years’ combined experience