Electric arc spraying is a thermal spraying process it is using an electric arc between two consumable electrodes of the surfacing materials as the heat source. The principle of this process is shown by the figure. The two metal electrode wires are fed by a wire feeder to bring them together at an angle of approximately 30 degrees. The wires melt in the arc and the jet of air atomizes the melted metal and propels the fine molten particles to the surface. The power source for producing the arc is a DC constant-voltage welding machine. The wire feeder is similar to the used for gas metal arc welding except that it feeds two wires. The gun can be handheld or mounted in a holding mechanism and movement mechanism. The gun is moved to the other to provide a coating surface on the part.
The arc spray gun is a coating process in which where two consumable metal wires are fed independently into the spray gun. These wires are charged and an arc is generated between them. The heat from this arc melts the wire, which is then entrained in an air jet from the gun. This entrained molten feedstock is then deposited on the substrate with the help of compressed air.
Wire arc spray gun is a coating process in which where two consumable metal wires are fed independently into the spray gun. These wires are charged and an arc is generated between them. The heat from this arc melts the wire, which is then entrained in an air jet from the gun. This entrained molten feedstock is then deposited on the substrate with the help of compressed air.