Material in powder form is melted in a flame (Oxy-Acetylene or Hydrogen most common) to form a fine spray. When the spray contacts the prepared surface of a substrate material, the fine molten droplets rapidly solidify forming a coating.
The main advantage of this process over the similar wire flame spray process is that a much wider range of materials can be easily processed into powder form giving a larger choice of coatings.
|Heat Source||Oxy-Fuel Combustion|
|Flame Temperature (°C)||3000|
|Particle Velocity (m/sec)||< 300|
|Porosity (%)||10 to 15|
|Coating Adhesion (MPa)||14 to 21|