plasma spraying

Typical coatingscold gas spray graphic

  • Self-fluxing alloys (fusing)
  • Iron-based alloys
  • Nickel-based alloys
  • Ceramics & Cermets
  • Abradables

 

Main applications

  • Wear resistance
  • Corrosion protection
  • Chemical resistance
  • Dimensional restoration


What is flame powder spray?

The Flame (or Combustion) Powder Spray process uses a similar technique as the Flame Wire Spray process, except that the wire feedstock is replaced with a powder. The main advantage of this process is that a much wider range of materials (such as nickel or cobalt-based self-fluxing alloys or ceramic materials) can be easily processed into powder form giving a larger choice of coatings. Many alloys are difficult or cannot be produced in a wire form and for this reason, it was developed.

The process relies on the chemical reaction between oxygen and fuel of combustion to produce a heat source. This heat source creates a gas stream with a temperature in excess of 3,000°C with correctly balanced conditions between oxygen and acetylene. The feedstock material to be sprayed is fed into the flame in the form of a powder to melt and the thermal expansion of the combustion is then used to atomize and accelerate the particles onto the substrate.

 

Read about other processes:

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