Flame Spray

What is flame spray?

Flame spray coating is the most basic form of thermal spray and one of the oldest. It's tried and true techniques provide great restoration for damaged machine parts. Flame spray at HTS Coatings is typically performed using oxygen and acetylene and can be sprayed with either wire or powder materials. Flame spray melts these materials in the combustion stream and applies the material to the part.

Flame Spray Process Diagram for Wire Materials

Flame Spray Process Diagram for Powder Materials

Flame Spray Solutions

Flame spray can easily repair surface erosion but is also good for larger surface gouges since it can deposit large amounts of material easily. The flame spray gun is designed to be sprayed robotically and can spray inner diameter (I.D.) and outer diameter (O.D.) surfaces. It can also be transported to a site for field service repairs of larger machine parts. Flame spray is the most economical solution if one is seeking wear resistant surface enhancement.

Common Coating Solutions

Abradable coatings
Metals
Alloys
Composites
Self-fluxing
Aluminum Oxides Cermets

Common Coating Materials

Stainless steel
Bronze
Babbitt
Nickel aluminum

Flame Spray is great for...

Shaft enhancement or repair
Bearing housing enhancement or repair
Casting repairs
Mold dye enhancement or repair

Flame Spray Coating Properties

Operating Cost	Economical
Bond Mechanism	Mechanical (1,000-5,000 psi)
Max Flame Temperature	5,600° F
Particle Velocity	160-300 ft/sec
Max Spray Rate	20 lbs/hr
Coating Thickness Range	0.005" to 0.250"
Special Features	Economical, no heat distortion
Wear Resistance	Acceptable
Corrosion Resistance	Poor to Medium
Porosity	High

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