HVOF is a powder spray technique which significantly improves the surface characteristics of a material and lengthens its useful lifetime, even in particularly corrosive and high-wear working environments.

This coating is characterised by its high density and bond strength, which guarantees an increased level of adhesion of the spray coating, a high level of hardness and very low porosity; together, all these factors offer a high level of resistance to wear. The high speed allows the temperature of the substrate to be kept low during application.

The system uses a mixture of fuels (liquid hydrogen, or the more commonly used kerosene), which burns with a high percentage of oxygen to produce a flame whose flow speed exceeds 1800 m/s; the metal powders are then injected, which melt immediately with an acceleration of 1200 m/s2 and then collide and solidify, thus creating extremely compact lamellar structures thanks to the high level of kinetic energy they possess.