Wire flame spray gun and how does wire flame spray gun work?
Wire Flame spray is a robust and user-friendly wire metal spray system use for spraying both ferrous and non-ferrous material. It is the type of process in which uses an oxy-fuel flame to melt the wires. So, after melting the spraying material, it is atomized with compressed air to create a spray flow that applies the coating on the surface.
Wire flame spray gun working
The spraying material in the wire form is fed continuously into a fuel gas-oxygen flame where it is melted by the heat of that combustion. And, Compressed air surrounds the flame and atomizes the molten tip of the wire. This speeds up the spray of molten particles towards the prepared work-piece surface.
Wire flame spray is the flame best process coating. It allows for the application of aluminum, zinc, and zinc/aluminum alloy coatings using the flame spraying method. A schematic of a typical flame spray system .depicts a typical wire flame spray gun. The wire flame spray gun consists of a drive unit with a motor and drives rollers for feeding the wire and a gas head with valves, gas nozzle, and air cap that control the air of the flame and atomization.
Compared with arc spraying, wire flame spraying is slower and more costly because of the high cost of the oxygen-fuel gas mixture compared with the cost of electricity. Flame spray systems are field-portable and they may be used to apply the quality type of coatings for corrosion protection.
Wire flame spray gun process properties
- Feedstock: wire or rod
- Combustion of fuel and oxygen
- Fuel: propane, hydrogen, acetylene
- Flame spray temperature < 3.200 ºC
- Flame spray velocity low
- Particle velocity < 150 m/s
Wire flame spray applications
- Wear resistance
- Friction properties
- Corrosion protection
- Electromagnetic shielding
- Rebuild and Salvage Operations
Technical Advantages
- Less oxide in most coatings
- Coatings can be simpler to machine due to decreased oxide
Economic Advantages
- Higher deposit response with low melting point materials such as aluminum and zinc
- Lower initial equipment
Operational Advantages
- Non-conductive wires can be sprayed
- Limited fine dust generated when spraying creates overspray less flammable or explosive
- More portable for on-site spraying