Uniquecoat® i5™
Internal Diameter HVAF Spray Gun
The i5 I.D. spray gun is designed for internal diameter applications, delivering high-performance cemented carbide, metal, and alloy coatings on internal diameters as small as 65 mm.
The i5 operates on propylene, and its highly efficient 100% air-cooling system eliminates the requirement for a chilled water supply.
Uniquecoat i5 I.D. HVAF Gun
The i5 internal-diameter spray gun delivers high-performance carbide, metal, and alloy coatings for internal surfaces.
🟢 WC-based coatings with hardness up to 1200 HV300
🟢 Variable nozzle configuration allows spraying internal diameters as small as 65 mm
🟢 Coating porosity typically below 0.5%
🟢 Compressive residual stresses in deposited coatings
🟢 Negligible oxide content — typically only 1.5–2× higher than that of the feedstock material
🟢 Durable, reliable operation with minimal maintenance requirements
Key Features:
🟢 Axial powder injection – efficient, uniform particle heating and acceleration
🟢 100% air cooling – enables continuous operation without water or nitrogen cooling systems
🟢 Continuous spraying capability – can spray for hours without interruption
🟢 Low operating cost – optimized fuel and air consumption with minimal maintenance
🟢 No oxygen required – safe, environmentally friendly HVAF combustion process
🟢 Highest spray rate in class – delivers exceptional productivity and coating throughput
🟢 Low spare part consumption – long-life nozzles and combustion components reduce cost of ownership
🟢 Fast start-up – ready to spray within seconds for maximum uptime
Demo Videos of i5 HVAF Gun
i5 HVAF I.D. PROCESS DEMOSTRATION VIDEOS
Coating Microstructure
TYPICAL i5 COATING CROSS-SECTION MICROGRAPHS
Average Hardness 1110 HV0.3
Average Hardness 1110 HV0.3
Average Hardness 1203 HV0.3 Porosity: 0.03% via image analysis
Average Hardness 1203 HV0.3 Porosity: 0.03% via image analysis
Cross-sectional EDS (energy-dispersive X-ray spectroscopy) elemental mapping
No oxygen enrichment, no decarburization, and uniform W/Co/Cr distribution — all characteristic of a high-quality HVAF coating. The measured composition and morphology indicate minimal carbide decomposition, confirming low thermal input typical for HVAF vs. HVOF.