The wire arc electric spray process, also referred to as the electric arc process, involves the use of two consumable wire electrodes that are connected to a high-current direct-current (DC) power source. These electrodes are fed into a spray gun where they meet and establish an arc between them. The intense heat from the arc melts the tips of the wires, which are then fed into the gun using either an electric-driven motor or an air motor. The molten metal is subsequently atomized and propelled toward the substrate by a stream of compressed air. This process is highly efficient because the wires are directly melted by the arc, resulting in a thermal efficiency significantly higher than that of other thermal spray methods