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Kermetico HVAF and HVOF Thermal Spray Coating Equipment and Technology
Kermetico designs and manufactures HVAF and HVOF thermal spray coating equipment. Kermetico sprays with the the HVAF and HVOF equipment, in our shop in California, USA. Kermetico develops HVAF and HVOF application solutions in our job shop. Our entire HVOF HVAF product line has evolved from our spray shop work. Practical pragmatic thermal spray coating solutions serves as our real-world R&D lab.
Kermetico, Inc. manufacturers and builds in house HVAF and HVOF systems that operate a range of different velocity guns for the efficient spraying of tungsten carbide and metal coatings.
Our HVAF Carbide and metallic coatings sprayed with our Kermetico systems have high density and hardness, combined with excellent ductility. . This means outstanding wear and cavitation resistance of our impermeable, corrosion-resistant layers.
This high quality comes with lower coating costs. Kermetico HVAF systems use energy effectively, resulting in high spray rates and deposits per pass four to eight times higher than conventional HVOF.
We manufacture thermal spray equipment combining the advantages of both technologies: high quality + low cost of HVAF and compliance with HVOF standards.
Convertible HVOF and HVAF System: Operates in HVOF and HVAF modes
C7 – an HVAF/HVOF system for spraying large parts
C6 – a general purpose HVAF & HVOF gun
CID – an HVAF & HVOF gun to spray internal diameters 80 mm (3.15″) and larger
plus, can operate with all the AK guns
Multi-purpose HVAF AK systems, with a variety of spray guns:
AK7 – a high-power gun for the thermal spray of large parts
AK6 – a gun to spray tungsten and chromium carbide onto a balanced mix of parts
AK5 – a compact gun to spray smaller parts, thin walls, and complex surfaces
AK5-ID – a compact gun to spray internal surfaces 200 mm (8″) and larger
AK-ID – an 80 mm and larger internal diameter spray gun
AK-IDR – a rotating ID gun to spray 100 mm and larger bores
AK-HH – a hand-held gun for on-site coating
SL – a specialized gun for spraying low melting point metals
SP – a dedicated gun for the most efficient precious metals deposition (spray silver, gold, platinum)
STi – a specialized gun for the deposition of titanium and Ti-alloy coatings
HVAF Blasting Grit Feeder: the grit blast preparation of parts to reduce coating cost
Gas Permeability Tester for an instant check of a coating’s through porosity
Powder De-Duster to remove fine particles from a metallic powder improves qualtity
Kermetico HVAF Coating Features
Kermetico HVAF carbide coatings are better than HVOF coatings for wear resistance, corrosion protection and production cost. The high speed of the in-flight particles (higher than 1,000 m/s) in our HVAF process makes ver dense coatings with high bond strength.
Kermetico HVAF coatings are gas tight. HVAF coatings make an impermeable barrier between an environment and the substrate. HVAF process has a low spraying temperature 1,960-2,010°C and gentle particle heating lead to minimal powder phase transformation, and no elemental depletion & decomposition of the in-flight particle. Instead of using pure oxygen like standard HVOF processes, Kermetico uses air in our HVAF, this significantly reduces the oxide content in HVAF coatings = better coating quality.
WC-10Co-4Cr Coating Features A Typical HVOF Kermetico HVAF HVOF System Modes
Deposition efficiency, %
Young’s Modulus E, GPa
Apparent metallographic porosity
Bond strength, MPa (PSI)
Range of as-sprayed roughness
µm (µ in.)
Kermetico HVAF & HVOF equipment produces WC-based coatings with the highest fracture toughness, exceeding known HVOF.
Since the primary mechanism of wear of tungsten carbide coatings is attributed to the material brittleness, Kermetico’s HVAF overlay exhibits better wear resistance than pure HVOF versions.
You are welcome to visit our Kermetico Thermal Spray R&D center near San Francisco to meet our designers and see our equipment in action.
We efficiently deposit wear resistant and corrosion resistant coatings for varied applications, including:
HVAF HVOF hard chrome replacement
corrosion-resistant tanks and vessel coatings
Carbide erosion resistant coatings for pipes, elbows, and fittings
The Cold Spray Process: Cold spray, Gas dynamic cold spray, supersonic particle deposition, is a high-energy solid-state coating and powder consolidation process. In Cold spray a high-pressure heated carrier gas, (nitrogen or helium) accelerates a metal powder through a supersonic nozzle. The powder forms a coating (surface engineering) or free-standing component (Additive Manufacturing).
Bonding mechanism: Cold spray bonding is a combination of mechanical interlocking and metallurgical bonding from re-crystallization at high strained particle interfaces.
Compared with conventional thermal spray processes, cold spray has advantages:
metal powder sprayed is not fused or melted. The effect of heat on the coating and the substrate material is very low.
The high kinetic energy of the metal powder sprayed and the high degree of the metal powder deformation on impact with the substrate produces a homogenous and dense coating.
The range of coating thicknesses varies from 100 micron up to 5 centimeters or more.
Metal coatings have the same physical and chemical properties as the properties of the base material.
Cold Spray can create mixtures of metallic / nonmetallic materials to form a coating or free-standing structure.
Some Cold Spray Applications:
Corrosion-resistant coatings (zinc and aluminum),
Dimensional restoration and repair (nickel, stainless steel, titanium, and aluminum),
Thermal Spray produces smoke, dust, noise, sound, and gases. In your job shop, you need the proper equipment to handle the spray process, which is sealed from the dust created by HVAF, HVOF, arc spray, wire flame spray, plasma spray etc.
FAST AND ACCURATE! Diamond belts, films and strips ROLL GRINDING & FINISHING Diamond tools for rolls and cylinders Belts, strips, and lapping films for grinding, removing, and polishing of cylinders with hard coatings. Flexible diamond tools are easier to use, require less operators' skills, for more consistent and predictable results!
Bexxon Global Singapore, We have a network of partner companies across the world, to help you with local service if needed. In Japan, Singapore, Australia, Indonesia, Malaysia, Thailand, Korea, USA, Canada, China, France, Switzerland, UK, Turkey, India, Pakistan, New Zealand, Chile, Peru, Mexico.
Special industrial surface engineering processes
Contact us to discuss:
Optimal thermal spray process for you?
VRC Metal Systems high pressure cold spray services and applications
Saving money on HVOF, Plasma, Arc spray booths and dust collectors
HVAF, HVOF, Plasma, Laser Cladding, made in either China, Europe, USA
Custom designed integrated systems.
Factory direct prices?
Diamond Grinding with tool post grinders, diamond belts
CNC diamond grinding of HVOF coatings
Discussions and technical support
Bexxon: Factory Authorized Agent
Buy factory direct. Factory direct means the best pricing, reliable documentation, and assurance on the installation and commissioning.
Bexxon Global is expert with:
VRC Metal Systems High Pressure Cold Spray: USA for metal deposition with no distortion, high quality overlays (High Pressure Cold Spray)
Kermetico HVAF C -HVOF excellent quality HVAF C Kermetico Tungsten Carbide coating technology, spray rates up to 33 kg per hour
KGS Swiss diamond belts and tool post grinders TPG
Fireside Coatings USA, spray-on ceramic coatings for boiler corrosion, slagging, corrosion, and erosion resistance, XP61, F61, XP61-S
Turnkey Liquid Fuel HVOF and Mass Flow Plasma systems made to world class standards using world class components in China, in a professional factory, with 30 years of experience.
Spray booth, spray lathe, dust collectors, and design
Arc spray uses metal wires as the coating material. An electric arc provides the heat source, one positive and one negative wire. The opposite charged wires short circuit, forming a plasma temperature of 4,000°C. The wire melts, and once molten, compressed air to atomize and accelerate the feed metal towards the substrate.
Arc spray can also spray two different wires simultaneously to produce a pseudo alloy, often a bronze and a steel wire are used for coating cylinder heads and engine block. Cored wires containing tungsten carbides and special alloys can be sprayed as well.
Arc spray systems for aluminium and zinc have extremely high spray rates and can coat large areas quickly.
What is HVOF spray?
HVOF is a High Velocity Oxygen Fuel. The HVOF is a combustion process. HVOF fuels can be Hydrogen, Propane, Natural Gas, or a liquid fuel such as kerosene.
The combustion process generates an extremely high velocity gas stream. The gas stream propels the powder particles at near supersonic speeds.
HVOF key benefits are the extremely dense and low oxide coatings. Low oxides: Since the powder particles spend less time in the flame, and lower flame temperature 3,000 °C compared with plasma spray: HVAF (high velocity air fuel) has an even lower flame temperature than HVOF, and produces coatings that are even less oxidized, and more ductile.
As well as producing excellent bond strength, some HVOF coatings can be sprayed very thick due to the exceptionally high velocities producing coatings in compression instead of tension.
Learn more about the latest process of HVAF, high velocity air fuel, and HVAF C combining both high velocity air fuel, and high velocity oxygen fuel process in one system. Click here to learn more about high velocity oxygen fuel
What is thermal spray: "Thermal spray technology is a process of applying a coating to a surface using a high-velocity stream of molten or semi-molten particles. This process is often used to improve the surface properties of a material, such as increasing its wear resistance or corrosion resistance.
The thermal spray process involves heating a wire or powder material to a semi-molten or molten state, and then accelerating the material through a nozzle using a high-pressure gas. The material is then sprayed onto the surface to be coated, where it rapidly cools and solidifies.
One of the key advantages of thermal spray is that it can be used to apply a wide range of materials, including ceramics, polymers, and metals. This makes it a versatile option for a variety of coating applications.
Thermal spray has a wide range of applications, including aerospace, automotive, and biomedical industries. It is also frequently used in the repair and maintenance of equipment and machinery.
Stay nerdy and keep up with the latest developments in thermal spray technology!"