Coating Application

UniqueCoat Technologies provides in-house and on-site application of thermal spray coatings of metallic alloys and cemented carbides. Many of such applications are considered unique, since they are available only with Activated Combustion HVAF technology.


Hard Chrome Alternative Coatings with Optical Mirror Finishing

Coatings of the most popular Tungsten Carbide-based compositions are applied onto roll surface and superfinished to roughness better than Ra 0.3 micro-inch. Such surface quality became possible due to superior density of AC-HVAF coatings and absence of brittle phases, usually formed due to oxidation and thermal deterioration of carbides in other thermal spray processes.

AC-HVAF WC-based coatings are noticeably harder than Hard Chrome, exhibit better toughness and can be applied to practically any thickness, providing armor-like performance during service. Coating quality consistency is a strong characteristic of AC-HVAF technology.

Read more about Hard Chrome Replacement


High-Temperature Corrosion Resistant Coatings for Boiler Waterwall Panels

AC-HVAF coatings of nickel-based superalloys and hardened stainless steel reveal excellent resistance to gaseous and salt-ash corrosion in pulverized coal, black liquor recovery and waste-to-energy boilers. Contrary to other coatings, AC-HVAF sprayed materials perform similar to fused alloys. Such phenomenal performance is a result of extremely low oxygen content in AC-HVAF coatings, their initially high density, bond strength and even quality distribution. During service in boiler, coatings undergo intensive sintering, transforming sprayed structure into fused-like. Panel spray applications are fully automated.

Tech. bulletin UCT-625
Tech. bulletin UCT-45


Erosion Resistant Coatings for Complex-Shape Impellers

Complex-shape impellers, such as coal impellers in boiler burners, high-speed dust impellers in cigarette-making machines, etc., are successfully sprayed with AC-HVAF WC-based coatings. Lifetime of coated impellers exceeds the one for non-coated by several folds. The technology becomes possible due to jet narrow size (target spot 8-10 mm) and absence of side effects in AC-HVAF process, associated with deposition of reflected particles, spray dust collection, overspray onto adjacent surfaces.


Thick Coatings

AC-HVAF coatings of metallic alloys and cemented carbides are sprayed to thickness 0.040-0.500 inch (2.0-12.5 mm) for wear plates, drilling housing, to repair casting defects or for dimensional restoration of parts made of costly superalloys.

The specifics of coating formation during solid particle impact minimize residual stresses in AC-HVAF coatings and provide their superior crack resistance. As a result, the technology practically has no restrictions on coating thickness.


Small Target Parts

Hardface metallic coatings are efficiently applied onto small-size work pieces, such as 1/8” (3 mm) diameter pins, 1/4" (6 mm) wide sealing rings, etc. With the SB500-SF nozzle assembly, AC-HVAF gun generates spray particle jet as narrow as 4-5 mm, dramatically improving the process target efficiency.