Jennifer Bourn. This post is part of the Color Meaning Blog Series, detailing the meanings associated with colors such as red, orange, yellow, green, blue, purple, grey, black, white, brown, pink, turquoise, gold, silver, and beige.
Instructions. Know what metal you are welding. Welders have figured out that nitrogen, as well as hydrogen, works well with stainless steels. If your metal is stainless steel, then nitrogen welding gas is a good choice. Put on your protective gear. This includes gloves, a welding jacket and a welding mask.
Usually, gas mixtures for MIG welding is a blend of carbon dioxide and argon. The main job of the shielding gas is to cover the mouth of the weld and keep it from coming in contact with oxygen and nitrogen and the surrounding air, but these gases also affect the characteristics of the arc itself.