Shielded Inert Gas Metal Arc (SIGMA) Welding | Metal Inert Gas (MIG) Welding | Gas Metal Arc Welding (GMAW)
Metal Inert Gas welding (MIG) uses a shielded arc struck between a bare metal electrode and the workpiece. The metal electrode is provided in the form of a wire reel.
Metal can be transferred in three ways:
1. Spray
2. Globular
3. Short-circuiting