Black oxide is a common heat treatment method for metal. The principle is to produce an oxide film on the metal surface to isolate air and prevent rust.

Available Materials

Aluminum Image

Aluminum

High machinability and ductility, good strength-to-weight ratio. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.


Price
$ $ $
Lead Time
< 10 days
Tolerances
±0.125mm (±0.005″)
Max part size
Min part size
Stainless steel Image

Stainless steel

Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.


Price
$ $ $
Lead Time
< 10 days
Tolerances
Machining tolerances depend on the detailed material used.
Max part size
The maximum size of the part is determined by the machines available and the complexity of the part.
Min part size
The minimum size of the part is determined by the machines available and the complexity of the part.

Design Considerations

  • Make sure that the material being treated is compatible with the black oxide process, some materials are not suitable for this process.
  • Excessive fumes from the black oxide process can be hazardous and should be properly managed.
  • Different treatments vary in cost depending on the material and the size of the part being treated.
  • Consider the overall time required for the black oxide process. This can be affected by the type of material and how long the parts need to be soaked in the black oxide solution.
Black Oxide 1
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