Plasma — atmospheric plasma spray (APS)

Atmospheric plasma spray (APS) — otherwise known as plasma spraying — involves spraying a coating by creating a plasma, which results in extremely high temperatures (+/- 15000 °C).

Basic principle

Atmospheric plasma spray (APS)

Atmospheric plasma spray (APS) — or plasma spraying — is a technology in which a strong arc between a positive anode and negative cathode ensures the process gas can be isolated as a plasma, the fourth fundamental state of matter alongside solid, liquid and gas. By injecting a material in powder form into this plasma flow, it melts while being projected onto a workpiece.


  • Extremely high temperatures mean this technology is suitable for materials with a high melting point
  • Wide range of sprayable powders
  • Excellent adhesion
  • Homogeneous layer
  • Fine microstructure
  • Little or no porosity
  • Strong UV light due to process


  • Improved performance
  • Less downtime
  • Longer lifespan
  • Antistatic properties
  • As good as no limit on how often parts can be re-engineered
  • Environmental protection (heat, acidity, working environment)
  • Improved seal

Available coatings

  • Ceramic:
    • Aluminium oxide (Al₂O₃)
    • Aluminium titanium oxide (Al₂O₃TiO₂)
    • Chromium oxide (Cr₂O₃)
    • Zirconium dioxide (ZrO₂)
  • Metals
  • Carbides
  • Cermets


Machine parts, with a view to:

  • Corrosion resistance
  • Extremely high wear resistance
  • Electrical insulation
  • Electrical conductivity
  • Chemical resistance
  • Thermal insulation (TBC — thermal barrier coating)
  • Non-stick properties
  • Improved seal on seal faces


Antistatic rollers for the textile industry (godet rollers, sizing rollers, pulling rollers) / Burner nozzles / Gas turbines / Hydraulic rods (Piston rods) / Bushings / Furnace rollers