Thermal plasma spraying is one of several methods that use heat to add special coatings to the surface of items/objects. There are a number of reasons for doing this, with extending the lifespan perhaps the main one. Coatings can range in thickness from just a few micrometres through to several centimetres.
What are the potential dangers?
The main potential hazards associated with thermal plasma spraying are related to heat, fumes/dust, noise, electricity, and UV.
Thermal plasma spray uses a flame that can reach temperatures of between 10,000 and 15,000°C. This is obviously potentially very dangerous and poses a real threat to anyone within close proximity.
As the process atomises molten metals, there is a possibility that fumes and dust can harm the operator. Steps to reduce this exposure include using extra ventilation or wearing SCBA respirators.
Plasma spraying is a “noisy” process, with the sound pressure levels sometimes exceeding 130dB. The process should only be undertaken in specially designed enclosures, and high-strength ear defenders should be worn at all times.
The power supply required for plasma spray equipment will typically be fed from a high-voltage supply, which is likely to be considered potentially hazardous.
Plasma spraying emits significant ultraviolet light, so there is a need for a high level of protection against this. UV dark glass should be installed over the windows of the enclosures/spray booths, welding screens should be used, and anyone in the area should wear green welding goggles with a shade of 6 or 8. All skin should also be completely covered.
Surface coating experts
If you feel that your business could benefit from these technologies, companies that specialise in thermal plasma spray coatings – such as Poeton – can provide advice, products, and services.
Plasma spray coating – industries and applications
Plasma spray coatings are used in numerous industries, including automotive, medical, marine, aerospace, automotive, and petrochemical. Examples of items that are often coated using thermal plasma spray are hair straighteners, pet toys, engine piston rings, bypass shafts, dental implants, and solar panels.