How to Use Co2 for MIG Shield Gas
Metal inert gas (MIG) welding is an electric arc welding process that passes an electric current through a consumable metal wire to create a spark that is hot enough to melt and fuse steel. This type of welding requires the use of an inert shielding gas to protect the welding site from airborne atmospheric contaminants that can create holes and cracks in the weld. Pure carbon dioxide gas is a cheaper shielding gas than argon gas, but only effective for use in welding carbon steel.
Things You'll Need
- MIG welding machine
- CO2 shielding gas
- Carbon steel welding pieces
- Clamps
- Wire brush
Instructions
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1
Attach the gas hose from the MIG welding machine to the regulator valve on the CO2 tank.
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2
Arrange the carbon steel pieces in the configuration that they will be welded and clamp them in place so they do not shift during the welding process.
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3
Brush the edges of the welding pieces vigorously with a wire brush to remove any oxidation, paint or dirt.
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4
Hold the welding torch at a 45 degree angle from the welding pieces and pull the trigger on the welding gun to spray shielding gas onto the weld site and strike an electric arc weld.
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5
Slowly move the welding torch in a small circular pattern to melt the metal pieces together.
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Continue this welding process until you reach the edge of the welding piece.
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Tips & Warnings
Always weld in a well ventilated area.
Wear welder's gloves and a welding mask when working.
References
- Photo Credit Jupiterimages/Photos.com/Getty Images
