Arc spraying is a technique in which molten metal is melted by an arc between two continuously fed wires. The molten metal is atomized by a high-speed air stream and the atomized metal particles are accelerated so that they are sprayed onto the artifacts to form a coating.

The working efficiency of arc spraying technology is very high, at the same time, the working cost is relatively low, the substrate is less affected by heat, so this technology is widely used in anti-corrosion, repair, special coating and other aspects. However, compared with plasma spraying and supersonic flame spraying, arc spraying has lower coating quality, binding strength of about 20MPa and porosity of 3% ~ 10%, which limits the application range of arc spraying technology.