CrN-coated femural component made by DOT GmbH

Chromium Nitride Coatings (CrN)


For generation of the CrN coating, the energy transfer of the arc into the target releases chromium atoms, ionises them and accelerates them through the applied voltage towards the implant. During the process, nitrogen is introduced into the vacuum chamber. The nitrogen atoms combine with the chromium atoms on the implant surface to form the desired CrN coating.
CrN-coated femur and tibia component
Range of Application
  • Orthopaedic implant components
  • Surgical instruments
  • Rotating instruments
Advantages of the Procedure
  • Higher wettability with synovial fluid
  • Low friction articulation
  • Long-term chemical stability
  • Outstanding coating adhesion

CrN coatings only modify the surface properties. The material properties and biomechanical functionality is not altered by the coating.
  • Colour: metallic silver
  • Coating thickness: 1–10 µm
  • Roughness Ra: ≤ 0.05 µm
  • Adhesive strength: HF 1–2
  • Coating hardness: ~2,000 HV

Charles-Darwin-Ring 1a
18059 Rostock l Germany

Phone: +49 381- 4 03 35-0
Fax: +49 381- 4 03 35-99


© 2018 DOT GmbH. All Rights Reserved.