Mig Welding (GMAW – Metal Inert/Metal Active Gas Welding or Gas Metal Arc Welding)
Known as CO2 welding.
It is a semi-automatic arc welding process whereby a consumable wire electrode along with an argon based or argon mix shielding gas is fed through a welding gun at an adjustable speed & flow rate which causes an electric arc to be created between the solid filler wire and work piece creating heat and a weld puddle that will then cause them to melt and fuse together.