Electric wire arc spray is achieved by energizing
two wires of the coating material at different continuously fed
together at an angle. A flow of compressed gas atomizes and accelerates
the molten particles toward the substrate.
Combustion flame spray is acheived by burning
a mixture of oxygen and acetyline in a torch having a flame-accelerating
nozzle. For material in wire form, the flame is concentric to the
wire fed through the nozzel axis. Combustion gas melts, atomizes,
and propels molten particles to the surface for coating. Powders
are injected into the flame nozzle by carrier gas, where they melt
and are projected to the surface.