*Arc welding is a process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals.

*It is a type of welding that uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point.

*They can use either direct (DC) or alternating (AC) current, and consumable or non-consumable electrodes.