Welding Shielding Gases: Why are Gas Shields Necessary in Welding?

Person GMAW/MIG welding a metal workpiece.

Weld areas need protection from contaminants in the air. Atmospheric gases like oxygen, nitrogen, hydrogen and water vapor can impair welds and cause oxidation.  All types of arc welding require a shielding gas, whether you’re practicing GMAW (MIG welding) to join thicker materials or GTAW (TIG welding) to fuse thin metals.  Welding shielding gases influence […]