Well my guess would be that CO2 can be reduced to CO and you don't want to be breathing CO as it compromises functionality of hemoglobin. I would also guess that using a gas that can oxidize hot metal is likely not ideal for TIG welding.
I have used only CO2 with my MIG for many years. A bit more spatter, not quite as aesthetic a finish, but seems to be just as strong & durable, plus cheaper & no bottle rental.
![Mig welding with Argon and Co2 [ Etch Testing]](http://i.ytimg.com/vi/C09LC-lltWo/mqdefault.jpg)
![Mig welding with Argon and Co2 [ Etch Testing]](/img/tr.png)
That's TAG, not TIG!
Hardcore emergency welders use exhaust fumes from a car for shielding gas😂
That is true, its not inert gas so yes TAG would be the proper term.
That’s carbon monoxide mostly
Well my guess would be that CO2 can be reduced to CO and you don't want to be breathing CO as it compromises functionality of hemoglobin.
I would also guess that using a gas that can oxidize hot metal is likely not ideal for TIG welding.
People used to do mig with pure co2 all the time and some still do if they want to save money.
I have used only CO2 with my MIG for many years. A bit more spatter, not quite as aesthetic a finish, but seems to be just as strong & durable, plus cheaper & no bottle rental.
Awsome. Will give a try