Passivate is a process used in CNC surface finishing that helps to protect the surface from corrosion and other environmental damage.

Passivation is treating a metal surface with an acid or other compound to form a protective coat that prevents corrosion and rust.

Available Materials For Passivate

Aluminum Image


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.

$ $ $
Lead Time
< 10 days
±0.125mm (±0.005″)
Max part size
Min part size
Steel Image


Steel is a strong, versatile, and durable alloy of iron and carbon. Its applications range from construction materials and structural components to automotive and aerospace components.
Steel is strong and durable High tensile strength Corrosion resistance Heat and fire resistance Easily molded and formed.

$ $ $ $ $
Lead Time
< 10 days
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

  • The specific concentration of the passivation should be determined based on the type of material being processed.
  • The temperature of the passivate solution needs to be controlled to minimize the risk.
  • The exposure time for passivation should be considered carefully to ensure optimal performance.
  • The quality of the passivate solution should be monitored regularly to ensure it is effective.
  • The passivation process should be designed to be compatible with any safety or environmental regulations that apply.
  • Proper ventilation should be provided to ensure that fumes are not created during the passivation process.
5 axis CNC aluminum smooth polishing sandblasting passivation
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