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just to say thanks!? Answered

THANK YOU for doing this! it's extremely well written, and enjoyable as well!



9 days ago

Just a couple of points about the text. If a shielding gas contains CO2 it is NOT a MIG welding operation it is a MAG welding operation since CO2 is an active gas - it breaks down (dissassoation) in the welding operation to produce Carbon Monoxide (which absorbs uncontrolled Oxygen from the atmosphere) preventing it entering the weld, and Oxygen (controlled amount, e.g 10% in the shielding gas) which determines the weld metal fluidity and weld penetration and is therefore not Inert. Argon and Helium are the inert welding gasses. Also Oxygen is not flammable - but it supports combustion.