Using a heat flow of around 2,500 degrees centigrade produced by acetylene and oxygen, the material to be sprayed is introduced in the form of a wire which, when it comes into contact with the flame, melts immediately. A jet of compressed air then atomises the melted section of the wire, projecting the melted particles onto the substrate.

The coatings obtained using this technology are microporous and extremely thick, even up to 6-9 mm.

The most commonly used coating materials are molybdenum, steel, carbon steel, martensite stainless steel, bronze, copper, zinc, aluminium and white metal.

Key applications include restoring the dimensions of worn parts such as (large) crankshafts, bearing housings, bushes, guides, and gibs, as well as galvanisation.