What is atmospheric plasma spraying?
In the atmospheric plasma spraying (APS) process, metals or alloys are melted and sprayed onto a surface using a plasma jet heated to more than 10,000 °C.
Atmospheric plasma spraying can be used with a wide range of materials and creates a high-quality and repeatable coating. It is often used to protect against wear, corrosion, oxidation, for thermal insulation or to improve a substrate’s function.
Atmospheric plasma spraying employs a technique essentially similar to PTA welding. The difference is that the flame comprises an electrically excited plasma of high velocity and temperature (≈15,000°K). This permits a denser coating (95-98%). Deposition rates range from 2 to 8 kg/hour, and surfacing thickness from 0.1 to 2.5 mm.
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