Plasma Powder Welding is a well known process for improving the surface properties of heavy duty parts. In automotive it is used as well for preventive coating as for mentainance and repair applications.
Tated by using the Plasma Powder Coating process. During the opeartion of the valves in an engine, they have to withstand high mechanical impacts, temperature changes as well as hot-gas corrosion. By coating the sealing surface of the valves with special powder alloys, the life time increases significantly. Today most of the engine valves are treated with preventive coatings.