Shielding Gas Protective gas used to shield the arc and molten weld pool from atmospheric contamination during GMAW. Used in courses Applied Arc Welding: Advanced GTAW and SMAW Foundations — Part 1 Flux Cored Arc Welding Foundations — Process Control and Entry-Level Practice Gas Metal Arc Welding (GMAW) Fundamentals MIG Transition and FCAW Continuation — Setup, Metallurgy, and GMAW Fundamentals Keep exploring Browse the glossary hub Browse careers Find a course