Using a process known as HVOF, the coating is applied with a special gun resistant to high pressure gases. The powder particles are accelerated by an extremely high speed gases stream (between 5,000 and 6,000 ft/s). They are injected in the flame, protected from the atmosphere and impinged onto a substrate. This combination of high speed gases with molten powder particles strike the substrate in an extremely clean way. Interparticle bonding and sintering reaction provide a dense and uniform coating.
» Results:
. Coatings with porosity below 1% (high density), used as protection or with the choice of being machined and rectified to the required tolerances.
» Revestimentos aplicados:
. Nickel and its alloys
. Chrome and its alloys
. Cobalt and its alloyss
. Chrome carbides
. Tungsten carbides » Common examples of such processes:
. Electrolytic hard chrome replacement
. Wear rings and sleeves
. Gas compressor shafts
. Containment shell coating for process pumps
. Steel Mill Rolls
. Anilox rolls
