This process is basically the spraying of molten material onto a surface to provide a coating. 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.

Flame spray, also known as oxy/acetylone combustion spray is the original thermal spray technique developed nearly 90 years ago. It uses the basic principles of a welding torch with the addition of a high velocity air stream to propel molten particles onto the substrate.

• Coating thickness : 0.5 - 2.0 mm for ferrous material, 0.5 - 5.0 mm for nonferrous material and 0.4 - 0.8 mm for ceramic.
• Particle's velocity : up to 50 m / sec
• Deposition rate : 1 - 6 kg/hour
• Hardness : 82 Rb - 36 Rc for ferrous material, 32 Rh - 25 Rc for nonferrous material and 42 - 66 Rc for ceramic.
• Bond strength : 14 - 21 MPa for ferrous material, 7 - 34 MPa for nonferrous material and 14 - 34 MPa for ceramic.
• Density : 85 - 92 % of equivalent wrought material for ferrous and non ferrous material and 90 - 97 % of equivalent wrought material for ceramic
• Material : all kind of metal materials (such as Copper, Aluminium, Chrome Steel, etc) and non metal materials (such as Polymer, Nylon, Teflon, Ceramic, etc)

Aluminium	Babbit
Bronze	Cast iron
Ceramic	Chromium
Copper	Cobalt
Molybdenum	Nickel
Nylon	Plastic
Polymer	Teflon
Tungsten