Industrial Repair uses the Praxair TAFA JP 5000 process. This High
Velocity Oxygen Fuel (HVOF) thermal spray process uses liquid oxygen and kerosene in a
small rocket engine that produces a supersonic jet stream of 7200 feet per second, accelerating
particles to 3300-3900 feet per second. We apply tungsten-carbide particles in a matrix
of cobalt or cobalt and chromium. This coating can be applied in thicknesses up to 0.045” (1.14
mm). We can put this coating on a lightweight material such as titanium and aluminum, or
other materials such as aircraft stainless steel (15-5, 17-4) and carbon steel 4340, 4130,
4140 etc. Virtually any material can be coated using the HVOF thermal spray process.
How HVOF Works
The high particle velocity of the High Velocity Oxygen Fuel (HVOF) thermal spray produces coatings that are extremely dense, having a porosity of less than one percent. The High Velocity Oxygen Fuel (HVOF) thermal spray coating has a mechanical bond. The bond strength can be as high as 12,000 psi, which is attained by the high kinetic energy of the particles. This allows the application of dissimilar materials. Additionally, the amount of thermal input to the part being coated is minimal. The substrate temperature stays under 350°F; thus the process does not change the material properties of the parts being coated.
The HVOF Advantage
Due to the high density and bond strength, the High Velocity Oxygen Fuel (HVOF) thermal spray coating of tungsten- carbide that we apply is a perfect solution for extreme corrosion and wear environments such as aerospace, agriculture, automotive, chemical and refinery, marine, pulp and paper mills as well as other industries that need a high wear and corrosion resistant coating.