05 Apr |
(HVOF) High Velocity Oxygen Fuel Thermal Spraying |
High Velocity Oxygen Fuel Thermal Spraying, or HVOF for short, is a thermal spray coating process which relies on a high velocity but low temperature procedure to create extremely dense and strong coatings.
During the HVOF spraying process particles of the coating material are sprayed at the substrate (the material which is to be coated) at supersonic speeds. The extreme kinetic energy of these particles allows them to bond with the substrate to form a very dense and strong coating. To achieve this result fuel and oxygen are sent into a combustion chamber under pressure and in a continuous flow, which produces a jet of combustion products at extremely high speed. The coating material, in the form of powder particles, is then injected into this gas stream and becomes accelerated towards the substrate at a very high velocity. There are a number of different types of HVOF spraying guns and processes which differ in the types of fuel that they use (hydrogen, natural gas or kerosene) and their oxygen source (pure oxygen or compressed air).
HVOF is most suitable for use creating thermal coatings on the following materials:
In general HVOF is thought to result in an improved coating quality compared to other thermal spraying processes. Advantages include:
To find out more about the HVOF and other Thermal Spraying Systems options, contact the experts at IRS Ltd today.
Published Date: 5th April 2017
Category: Thermal Spray Systems