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High Velocity Oxygen Fuel (HVOF) coating
May 31, 2018


BenefitsApplication & materialsProcess details

· High Velocity Oxygen Fuel (HVOF) coating is a thermal spray coating process used to improve or restore a component’s surface properties or dimensions, thus extending equipment life by significantly increasing erosion and wear resistance, and corrosion protection.

· Molten or semi-molten materials are sprayed onto the surface by means of the high temperature, high velocity gas stream, producing a dense spray coating which can be ground to a very high surface finish.

· The utilisation of the HVOF coating technique allows the application of coating materials such as metals, alloys and ceramics to produce a coating of exceptional hardness, outstanding adhesion to the substrate material, and providing substantial wear resistance and corrosion protection.

· As the technology specialists in HVOF coating, Bodycote provides an array of spray coating materials to suit your specific needs. Backed by a customer-driven service, our facilities process a wide variety of component sizes to exacting standards with reliable, repeatable results.

Benefits

HVOF coating:

· Reduced costs;

· Improved performance;

· Improved electrical properties;

· Enabling components to operate in higher/lower temperatures;

· Enabling components to operate within harsh chemical environments;

· Improved efficiency; and

· Improved life of mating components

Application & materials

· Thermal spray coating is an attractive technique as it offers a wide choice of materials and processes that have a reduced impact on the environment when compared to conventional plating processes.

· HVOF coating materials available for thermal spray coating include metals, alloys, ceramics, plastics and composites.

Process details

· As with all thermal spray coating processes, HVOF coating material is heated and accelerated by a gas stream to a component’s surface, to attain better properties. With the HVOF coating process, the gas stream is produced by mixing and igniting oxygen and fuel (gas or liquid) in a combustion chamber and allowing the high pressure gas to accelerate through a nozzle. Powder is introduced into this stream where it is heated and accelerated towards a component’s surface. The resulting thermal spray coating consists of thin overlapping platelets.

 








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