FST - Flame Spray Technologies

GreenEco - exclusive representative of the FST Flame Spray Technologies. FST offers equipment, materials, and spare parts for all thermal spray processes. They also actively involved in research and development of new advanced technological solutions for the surface protection and/ or modification.
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Flame Spray Technologies

FST is a dynamic, innovative and experienced company active in thermal spray technologies with an emphasis on the development and delivery of complete systems for the high quality coating application. Both GreenEco and FST has the experience, knowledge and resources to provide full support in finding the best solutions to the specific surface protection problems.

Turnkey systems

Over the years FST has designed, manufactured and installed numerous turnkey systems around the world, for a variety of industries and applications.
Turnkey coating systems are fully developed and integrated equipments, designed to offer the best solutions tailored to individual customer needs. Typically the system includes the main coating and control device and all required peripheral components such as soundproof booths, robots, turntables, dust collectors etc. These components are fully integrated for automatic operation. This solution enables the user to monitor and control the operational process parameters and all alarm functions.

Turnkey Project includes:

  • Problem definition
  • Project
  • Thermal spray equipment
  • Project management
  • Installation
  • Training
  • Final acceptance
  • Transfer of know-how / improvement of qualifications
  • Technical customer service


FST offers complete HVOF spray units including all accessories such as cables and hoses, cooling nozzles and support components.

HVOF is a thermal spray system that uses the combustion of gases such as hydrogen or liquid fuels such as kerosene. Fuel and oxygen mix and atomize in a controlled combustion area where correct combustion mode and pressure are monitored.

eGun ™
The ability to reach high pressure in the combustion chamber of the eGun ™ burner accelerates powder particles to very high velocity. This results in the production of high-quality, high-density coatings with a very low oxide content.

Typical Coating Materials:

  • Nickel and cobalt alloys
  • Triballoy, Inconel, Stelit
  • Iron-based alloys
  • AISi, L
  • Carbides, cermets,
  • MCrAlYs

Typical Applications:

  • Coatings resistant to mechanical damage by friction, abrasion, erosion, etc.
  • Chemical resistance
  • High temperature applications

Plasma spray

FST offers complete plasma spray systems including all accessories such as cables and hoses, power supply and controller, booths, filtering/suction units, cooling nozzles and other components.

In the process of plasma thermal spraying, argon flows between the electrode and the nozzle, where an alternating high frequency electric arc of high voltage is generated, which is used to ionize the gas stream. By increasing the arc current, the arc becomes denser and the degree of ionization increases. This in turn increases the plasma energy and also, as a result of the gas expansion, increases the velocity of the plasma stream.

For argon-only plasma, it requires a very high current (typically 800 to 1000 amperes) to generate enough power to melt most materials. Addition of the H2 increases the power.

Typical Coating Materials:

  • Ceramics
  • Carbides and cermets
  • Metals and Alloys
  • Abradable coatings

Typical Applications:

  • Coatings resistant to mechanical damage by friction, abrasion, erosion, etc.
  • Chemical resistance
  • High temperature applications
  • Thermal barriers
  • Numerous others

Cold Spray

FST offers complete Cold Spray equipment and workstations, including all supporting components.

The Cold Spray process offered by FST can be considered a modification of the "HVOF" technology in which kinetic energy is increased and thermal energy is lowered. With Cold Spray, non-oxidized coatings can be produced.

The coating material particles are accelerated in the heated gas stream (600 ° C) to a speed of over 1000m / s. The extremely high particle velocity combined with the low particle temperature results in very dense and oxide-free coatings.

Common Coating Materials: Ductile Materials and Alloys, including Zn, Al, Ni, Ti, Cu, Ag, NiCr, CuAl, MCrAlY etc

High-class materials: Nob or Tantalum

Typical Applications:

  • Electrical and thermal conductivity coatings
  • Decorative coatings
  • Corrosion protection
  • Restoring the dimensions of elements

Arc spray

FST offers complete arc spray systems including all accessories such as guns, power supplies/ controllers, wire feeders, cables and hoses, cooling nozzles and all other support components.

This form of thermal spraying uses wire as the feed material. The electric arc is used as a heat source by using two electrically conductive conductors. When the wires are brought together, an electric arc is created between the wires, resulting in temperatures of approx. 4000 ° C. This temperature causes the wire ends to melt, and then compressed air or an inert gas is used to atomize and accelerate the metal towards the substrate.

One advantage of this system is that two different wires can be used simultaneously to produce pseudoalloy. Cored wires are also available for the production of coatings with unique properties.

This process is often used for large areas to provide corrosion resistance on large parts or to rebuild worn parts.

Typical Coating Materials:

  • Iron-based alloys
  • Nickel based alloys
  • Copper alloys
  • Aluminum, zinc, Al / Zn alloys
  • Babbit alloys

Typical Applications:

  • Wear resistance
  • Corrosion protection
  • Restoring of the dimensions

Flame spray (wires)

FST offers complete flame spray, wire feed equipment, including all auxiliary components.

This is a useful process for applying relatively inexpensive coatings that typically contain high levels of oxides and porosity. These coatings have rough surface finish. The is a combustion process that uses chemical reaction between oxygen and fuel to produce a heat source. This torch, under properly balanced conditions between oxygen and acetylene, produces hot gas stream at temperatures over 3000 ° C.

The feedstock to be atomized is fed into the flame in the form of a wire and the compressed air is then used to atomize the molten metal and accelerate the particles onto the substrate.

Among other things, this process is typically used to apply bond coating materials or materials for corrosion and wear resistance applications.

Flame spray (powder)

FST offers complete flame spraying equipment, including all auxiliary components.

The flame spraying process using powder materials is a similar technology to the wire flame spraying process. The main advantage of this process is that a much wider range of materials (such as nickel or cobalt-based self-fluxing alloys, cermets, ceramics) are available as powders, giving a wider choice of coatings. Many alloys cannot be produced as wires, that’s why the process for flame spray powdered materials has been developed.

The process involves a chemical reaction between oxygen and fuel to produce a heat source. Under properly balanced proportions between oxygen and acetylene, this torch produces a gas stream at a temperature above 3000 ° C. Powder material to be sprayed is fed into the flame, where is melted and atomized by a stream of hot has and air. Accelerated onto the target substrate will produce a coating.

Typical Coating Materials:

  • Self-fluxing alloys
  • Iron based alloys
  • Nickel based alloys
  • Ceramics and cermets
  • Abradable materials

Typical Applications:

  • Wear resistance
  • Corrosion protection
  • Chemical resistance
  • Restoration of dimensions

Comparison of the effectiveness of solutions