Cold spraying is a high-kinetic coating technology where, with the aid of inert gasses and pressure beyond 35 bar, metal particles are accelerated to over 1,200 meters per second. When hitting the objects’ surface these particles form an adhesive, almost oxide-free layer. cold spraying allows the production of coatings that have an identical composition to the feedstock. The substrate is not melted onto the surface. Instead it is sprayed or rather micro-welded, while being in a stable state, onto the surface in a cold-kinetic compaction process. This happens with supersonic velocity.

Coatings at the highest quality level are achieved. In contrast to the cold spraying, in conventional thermal coating processes materials will have to be heated up to several thousand degrees Celsius. These elevated temperatures trigger chemical reactions, which affect the quality and characteristics of the coating. Cold spraying doesn’t have this disadvantage.