mig gas

why can you get a higher penetration with carbon dioxide gas than you can
with a tri-mix gas, i.e. argon, helium, co2
curious,, thax for any response.
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Carbon dioxide decomposes at arc temperature into carbon monoxide and oxygen. It is thus not truly inert. When a deoxidizing electrode is used, welds are produced with no harmful gas porosity. It is a fact that good penetration and welding speed can be achieved, mostly with globular transfer mode. Welding with carbon dioxide is less expensive than with argon. It is questionable if there are any advantages in the use of three gas mixtures.
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Elia Levi

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