MIG welding and TIG welding comparison MIG welding (melting inert gas welding) English: metal inert-gas welding using molten electrodes, plus gas as an arc medium, and protecting metal droplets, weld pools and high temperature metals in the weld zone The arc welding method is called gas metal arc welding. The inert gas (Ar or He) protection arc welding method using a solid wire is called MIG welding, or MIG welding.

MIG welding uses a wire instead of a tungsten electrode in the torch. Others are the same as TIG welding. Therefore, the wire is melted by the arc and sent to the weld zone. The electric drive roller feeds the welding wire from the spool to the welding torch as required for welding. The heat source is also a DC arc, but the polarity is the opposite of that used for TIG soldering.

The shielding gas used is also different, and 1% oxygen is added to the argon gas to improve the stability of the arc. Like TIG welding, it can weld almost all metals, especially for welding aluminum and aluminum alloys, copper and copper alloys, and stainless steel. There is almost no oxidation loss during the welding process, only a small amount of evaporation loss, and the metallurgical process is relatively simple.