Five thermal spray coatings

Thermal spray coatings protect and extend the life of components that are exposed to heat, wear or corrosion. They add a hard surface layer so parts can be strengthened or made more reliable in demanding conditions.

The HVOF process

HVOF mixes fuel gas and oxygen to create a very high-speed flame. Coating powder is heated until it’s molten or semi-molten and then sprayed onto the surface at high velocity. The particles bond tightly as they cool and they form a strong thermal spray coating, like the examples seen here, www.poeton.co.uk/surface-treatments/thermal-metal-sprays/ that resists wear, abrasion and corrosion.

Processes like this are used across UK manufacturing and engineering sectors and surface treatments

Ceramic coatings

Ceramic coatings are mainly used for heat protection. They can reduce surface temperatures by up to one third and they’re often used in cars and motor sport but they are useful anywhere heat control matters.

Copper alloy coatings

Copper alloy coatings are thin, flexible and pretty low cost. They improve electrical and thermal conductivity and have a smooth base layer, which makes them ideal for precision components or parts needing further finishing.

Tungsten Carbide coatings

Tungsten Carbide is one of the most popular options for wear resistance at temperatures below 500°C. It’s used on parts that face constant abrasion or erosion and need a long service life.

Stellite 6 and Nickel alloy coatings

Stellite 6 is resistant to wear, chemicals and oxidation and it doesn’t affect the base material. Nickel alloy coatings increase surface hardness and strength, making them a good option in corrosive, marine or chemical environments.