The Gas Metal Arc Welding (GMAW) process
uses a continuous wire electrode to form the arc and add molten metal to the
weld puddle.Wire is constantly driven through the gun by feeding system.
Unlike SMAW welding, there is no need in
constant replace of electrodes.The puddle is protected by an atmosphere
of shielding gas, also delivered to the arc through the welding gun.
The MIG process reduces spatter,
provides better control and produces very clean welds with no slag
blanket.A similar process, Flux Cored Arc Welding (FCAW), uses a wire
with a central core of protective flux, which may eliminate the need for
MIG and FCAW are both very fast welding
processes which require a moderate level of skill.