Thermal spray is a coating process that provides functional surface to protect or improve the performance of a substrate or component. Almost any kind and form of material can be thermally sprayed—which is why thermal spray is used worldwide to provide protection from corrosion, wear, and heat, to restore and repair components, and for a variety of other applications.
In the wire arc spraying process two consumable metal wires are fed independently into a spray gun. These wires are then charged and an arc is generated between them. The heat from this arc melts the incoming wire, which is then entrained in an air jet from the gun. The molten material is deposited onto the substrate.
Wire arc spraying is a relatively inexpensive method and it has wide uses.