lämpösprayssä

Lämpösprayssä, often translated as thermal spraying, is a group of coating processes in which finely divided metallic or non-metallic materials are deposited in a molten or semi-molten state onto a surface. The coating material is heated to a high temperature and propelled at high velocity towards the substrate. The particles flatten and solidify upon impact, forming a cohesive coating.

The thermal spraying process utilizes various heat sources, including electric arcs, combustion flames, or plasma. The choice of heat source depends on the material to be sprayed and the desired coating properties. Common materials used in thermal spraying include metals like zinc, aluminum, and nickel alloys, as well as ceramics such as alumina and zirconia.

The primary function of thermal spray coatings is to enhance the surface properties of a component. This can include improving wear resistance, corrosion protection, thermal insulation, electrical conductivity, or restoring worn surfaces. The versatility of thermal spraying allows for the application of coatings onto a wide range of substrates, including metals, ceramics, and composites.

Applications of thermal spraying are found in numerous industries. Aerospace utilizes thermal spray coatings for components subjected to high temperatures and wear. The automotive industry employs it for engine parts and exhaust systems to improve durability and reduce emissions. In the power generation sector, thermal spray coatings protect turbine blades and other critical components from harsh environments. Other significant applications include the oil and gas industry, medical devices, and general manufacturing. The process is valued for its ability to create durable, functional coatings with minimal distortion to the substrate.