Post-Oxidation Nitriding

Galvanic treatments

Main board

This is a thermochemical treatment through which the superficial layer of a steel is enriched of nitrogen and carbon. Such process creates and an enforced layer that increases the hardness of the superficial layer: after the process of surface enrichment we will move onto a controlled and induces oxidation of the artefact, in an oven set under specific temperatures. This process is facilitated by the action of specific gases that generate an oxide veil of a few microns thickness giving it a typical black colouring.


  • Increase of superficial hardness
  • Improved resistance to wear and tear
  • Improved resistance to stress
  • Less Friction
  • 96 hours resistance in salt fogs according to UNI norms


From 0.05 to 0.30 mm


The product appears neat and in a shade of homogeneous black.


  • Nitriding steels
  • Steel used for tools
  • Carbon Steels
  • Tempering Steels
  • Low carbon steels
  • Cast-steels

Locations of the treatment

Alfa Ossidazione

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