Home/Technical Glossary/Arc Welding Arc Welding Arc welding utilizes a welding power supply or weld control to generate an electric arc between an electrode and workpiece, using the resultant heat to create the weld. The welding area is usually protected by some type of cover gas. Common types of arc welding include MIG (metal inert gas) and TIG (tungsten inert gas). AMADA WELD TECH’s MAWA-300A is an example of an arc welding power supply.