Calcium carbonate is decomposed and the products CO/CO2 form a gas shielding for the weld.
In MIG welding, the gas used to shield the arc is typically a mixture of argon and carbon dioxide or argon and oxygen. This shielding gas helps protect the weld from atmospheric contaminants and ensures a strong, clean weld.
Yes, it is possible to weld mild steel using only CO2 gas as the shielding gas. CO2 can provide sufficient protection to prevent oxidation during the welding process. However, the quality of the weld may be lower compared to using a mixture of CO2 and argon, which can provide better weld bead appearance and reduced spatter.
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CO2 is an oxygen compound or a non-inert gas,the purpose of a shielding gas is to shield the weld and the electrode from oxygen. argon, nitrogen and helium are the most common gases used for GTAW
Your best bet is a CO2 laser using an O2 jet. However, I doubt if any but the most determined could hobbyist could build that powerful of a laser. Still, CO2 is your best bet.
When you weld steel you need to make sure that oxygen in the air is kept away from the weld while it's being formed. Otherwise the iron in the weld burns in the oxygen and forms a poor weld. Electric welding rods are generally coated with a flux which forms a gaseous shield around the weld point and keeps away the air. Some welding processes (MIG for example - MIG stands for metal inert gas) do not use a flux coating but have an arrangement where argon or CO2 is passed to the weld point to keep the air away in a different way.
pacemaker is a pacemaker
How did the pacemaker effect the world?
It would likely fry the pacemaker
pacemaker
the answer is in the question. if the pacemaker is replaced the leads are used for it.