HVOF Coating Properties and Applications


HVOF stands for Higher Velocity Oxygen Fuel, and from its name, it is quick to deduce that this thermal spray approach has to do with making use of molten supplies (or semi-molten supplies) at a high speed on substrates. HVOF coating can present many one of a kind coating properties to get a wide range of applications across distinct industries, and that’s why this thermal spray process has become one of the most extensively utilized methods to make dense coatings on different varieties of surfaces.

HVOF is applied via flame spray
A spray head that mixes oxygen and a combustible fuel (a mix of kerosene, acetylene, propylene and hydrogen) to deliver a powdered friction-reducing coating material. The resulting mixture is sprayed in a jet-like effect at extreme temperatures between 5000-6000°F at velocities of more than 7000 feet per second. The extreme heat and spray pressure of HVOF combine to produce a coating of exceptional hardness, outstanding adhesion to the substrate material, and substantial resistance to corrosion. HVOF generally exceeds bond strengths of 12,000 psi between the coating and substrate, which allows HVOF coatings to maintain nearly 100% of their wear and corrosion resistance in high-temperature environments.

Useful for component repair
HVOF coatings may be applied in thicknesses of up to 1/2" without compromising their strength, making it possible to restore worn component surfaces with no additional machining required. High-Velocity Oxygen Fuel (HVOF) coating is often a thermal spray coating method employed to enhance or restore a component’s surface properties or dimensions, thus extending equipment life by drastically increasing erosion and wear resistance, and corrosion protection.

Molten or semi-molten supplies are sprayed onto the surface by signifies in the higher temperature, high-velocity gas stream, creating a dense spray coating which might be ground to a very higher surface finish. The utilization on the HVOFcoating method permits the application of coating supplies for instance metals, alloys, and ceramics to make a coating of exceptional hardness, outstanding adhesion for the substrate material and supplying substantial wear resistance and corrosion protection.

Because the technology specialists in HVOF coating, we deliver an array of spray coating supplies to suit your precise requirements. Backed by a customer-driven service, our facilities approach a wide selection of element sizes to exacting requirements with reliable, repeatable outcomes. The components available for thermal spray coating include metals, alloys, ceramics, plastics, and composites. As with all thermal spray coating processes, the coating material is heated and accelerated by a gas stream to a component’s surface, to attain better properties. With the HVOF coating approach, 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.

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