Layer thickness only 1 to 2 µm
No dimensional change on precision parts
Improved corrosion resistance when oiled
Uniform black appearance on steel and stainless
Suitable for tooling and fasteners
Also available as hot and mid-temperature processes
| Carbon steel and tool steel |
| Stainless steel |
| Cast iron |
| Powder metal parts |
| Fasteners and machined components |
| Specification | Details |
|---|---|
| Thickness | 1–2 µm |
| Colour | Black to dark grey |
| Materials | Steel, stainless, cast iron |
| Dimension change | Negligible |
| Corrosion | Improved with oil or wax seal |
| Lead time | 3–5 working days |
Oil or wax sealed for corrosion
Light oil for handling protection
Combined with machining marks
It slows corrosion rather than preventing it, and only when sealed with oil or wax. For demanding environments we recommend zinc or nickel plating instead.
Yes, using a specific process for stainless steels. It gives a uniform black appearance that is popular on instruments and marine hardware.
Because it adds only 1 to 2 µm, so tolerances and threads are unaffected. Plating would add 10 µm or more and require oversize machining.
Type II and Type III anodizing for aluminium: clear, black and colour finishes with improved corrosion and wear resistance, thickness from 5 to 50 µm.
Type III hard anodizing builds a 25-50 µm ceramic-like oxide layer with up to 500 HV surface hardness for wear-critical aluminium parts.
Glass bead blasting for a uniform satin finish on metal and plastic parts. Hides tool marks, prepares surfaces for coating and gives a premium matte look.
Sand blasting for surface cleaning, descaling and roughening. Removes rust, scale, old coating and oxide before welding, painting or bonding.
Mechanical polishing to mirror and optical finishes: Ra down to 0.05 µm for mould cavities, light guides, medical parts and decorative surfaces.
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