Cold spraying

Cold spraying is an innovative coating process in surface technology that makes it possible to apply high-quality coatings to a wide variety of substrates. In contrast to conventional thermal spraying processes, in which the coating material is melted and applied at high temperatures, in cold gas spraying the coating is applied at room temperature or slightly higher temperatures.

The cold spraying process is based on the acceleration of powder particles to high speeds by means of a gas stream, typically air or nitrogen. These particles then hit the substrate with high kinetic energy, causing them to solidify and form a dense, well-adhering coating. Due to the low process temperatures, thermally sensitive substrates remain unchanged and no undesirable thermal effects occur.

The advantages of cold spraying lie in its versatility and flexibility. The process is suitable for coating a wide range of materials, including metals, ceramics, plastics and composites. It also allows the use of a variety of coating materials, such as metal powders, ceramic powders or polymers, enabling a wide range of properties and applications.

Due to the low process temperatures, coatings with low porosity and high density can be produced, resulting in excellent mechanical and tribological properties. In addition, cold spraying offers the ability to apply precise, thin coatings suitable for applications in electronics, medical technology, aerospace and the automotive industry. Overall, cold spraying offers an attractive alternative to conventional coating processes and opens up new possibilities for the production of high-quality, functional surfaces with customized properties.