High Velocity Oxygen Fuel (HVOF)


HVOF is a thermal spray process that uses oxygen and a combustible fuel to produce a low heat, high density, mechanically bonded coating that has extremely low porosity and high bond strength. Typical coatings include tungsten carbide, chrome carbide, stainless steel, Inconel and Monel.

Common HVOF applications include:

Aerospace & Defense

  • Landing gear, internal and external surfaces


  • PCPD and PCP rotors
  • Bottom hole assembly component parts
  • Turbomachinery component parts


  • Cylinder rods
  • Suspension rods
  • Drive shafts

Petrochemical & Refining

  • Turbomachinery component parts
  • Valve components

Plastic and polymer processing

  • Extrusion and injection screws (OD)
  • Extrusion and injection barrels (ID)
  • Mixer and valve bodies

Features & Benefits

High kinetic energy process
  • Leads to high bond strengths (greater than 12,000 psi)
  • Creates an overlay well suited for high impact resistance
Extremely dense, low porosity coatings (typically less than 0.5%)
  • Produces highly corrosion resistant coatings
Low residual stress
  • Allows application of a thick coating
  • Extends the number times used components can be salvaged and returned to service
Rapid application process
  • Allows for quick component turnaround
High impact velocities and small powder sizes
  • Result in smooth, as-sprayed coatings
  • Can be applied to complex geometry outside diameter components
Low heat input
  • Process can be controlled to keep substrate temperatures below 300°F (149°C)
  • Versatility to service a broad range of components

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