Postoxidation

Composition and characteristics

  • Optional follow-up treatment of nitrocarburized components
  • The corrosion resistance of nitrides cases can be raised by postoxidation. The surface of the component gets a black, decorative look.
  • Oxide layer (ca. 1 - 2 µm)
  • White layer (10 – 20 µm)
  • Diffusion zone

Properties

  • Good wear resistance
  • Further increase of corrosion resistance
  • Improved running-in characteristics
  • Black, decorative look

Fields of Application

  • Corrosive and abrasive stressed components
  • Engine components with aggravated running-in characteristics

Typical Applications

  • differential pinion shafts
  • brake piston
  • gas pressure springs
  • eccentric shafts
  • hydraulic parts
  • piston rods
  • ball journal
  • bearing carrier
  • cam shafts
  • gearing lever shafts
  • sintered parts
  • die holders
  • barrel
  • barrel head