We engineer alloy-specific high velocity thermal spray systems dedicated to spray metal coating with the best quality and cost.
We manufacture advanced coating systems for cold spraying metals: Al, Au, Ag, Cu, Sn, Ti, Zn and alloys.
On the left: a Typical Micrograph of an HVAF Copper Coating, 300x
Ask us, and we could have an HVAF spray gun that will make the best quality coatings having low oxidation, high density, higher spray rate and higher deposition efficiency than any other high-velocity thermal spray equipment.
Making a new metal coating for application development, the engineer arrives at a procedure:
If we need a functional layer with a thickness of more than 50 microns (0.002”) the choice of equipment is quite limited:
What does this matter?
We have to choose high velocity thermal spray coatings.
But thermal spray system developers are concentrated mostly on high-volume applications: wear and corrosion resistant coatings. They optimize systems for the most popular materials. We have such systems in our portfolio too, but what if you need to spray a particular functional coating?
High-bond, non-porous titanium, tin, copper, silver or magneto-elastic material?
A mainstream system will most probably offer you quite a low spray rate and deposit efficiency due to nozzle clogging, material evaporation or low cohesion.
A lucky one will get 10-20% deposition efficiency for his valuable material, which most probably will not meet business requirements.
Here is the kicker:
We engineer alloy-specific high velocity thermal spray systems optimized to spray particular metal coatings.
The Kermetico HVAF process is extremely stable due to the utilization of micro-flame combustion technology enhanced with the catalytic insert.
Modular hardware design makes it possible to build specialized equipment: we adjust combustion chambers, nozzles and powder injectors to achieve optimized results.
A variety of fuel gases and the possibility of multiple additional gas injections make the process even more versatile and efficient.
We have engineered several systems optimized to spray particular powders. Here is the range of the Specialized guns’ possibilities.
powders up to 150 microns
1,500 – 2,000°C
|Gun equivalent power|
20 – 200 kW
|Particle temperature in the jet|
900 – 1,600°C
400 – 1,000+ m/sec
1,300 – 3,300+ ft./sec.
Why does this matter?
Once set up, our spray gun is technologically stable. That means that it will spray coatings with the required quality, spray rate and deposit efficiency with a broad range of spray parameters.
Why is that?
Our gun designs are well-calculated and made of modern materials, so our spare parts experience extremely low wear.
Depending on the erosive properties of the feedstock material we often get over one hundred hours of spraying from a nozzle.
The twin wire arc and flame spray processes apply aluminum or copper with high spray rates along with high porosity and high oxide levels so that the coating is inexpensive while it is of poor quality.
The cold spray process sprays a coating without oxidation and with low porosity, but its low spray rate and high equipment and gas costs make this coating expensive.
The Kermetico SL HVAF system provides an option to spray low melting point materials, like zinc coating, at up to a 10kg (22 lbs.) per hour spray rate, without oxidation, and with an applied cost not substantially higher than twin wire arc spray.
It is critical to have a stable and predictable technological process working with precious metals.
Our Kermetico SP High Velocity Air Fuel (HVAF) gun heats silver or gold powder just below their melting points which prevents material evaporation.
Then it delivers hot powder to the solid metal substrate at supersonic speed and deposits it densely.
With our system, you will not lose your precious metals due to evaporation. Most of it will be deposited as a high-quality coating; the remainder will go into your filtration system.
We have developed our Kermetico STi as an answer to an industry request for a uniform non-oxidized Titanium coating with a thickness of 50 to 250 microns. (0.002”-0.010”)
This Titanium-focused system sprays non-oxidized dense Ti and Ti alloy coatings.
What is the bottom line?
We proudly design and produce our HVAF thermal spray equipment in California and install it all over the world.
We have installed more than 60 HVAF systems worldwide. Some of the systems are at work in Universities and National Labs, but most of them are used in production thermal spray shops.
Here you can watch videos of our HVAF systems in action.
We provide HVAF thermal spray coating services for customers around the San Francisco Bay Area in California, USA.
Check our AK systems, designed to deposit mainstream materials, like tungsten or chromium carbides.