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Weld seam porosity
Cause:
Spattering in the gas nozzle, causing inadequate gas-shielding of the weld seam
Remedy:
Remove welding spatter
Cause:
Either the shielding gas hose has holes in it, or the hose is not connected properly
Remedy:
Replace shielding gas hose
Cause:
The O-ring seals on the connection points have been cut through or are faulty
Remedy:
Change the O-ring seals
Cause:
Moisture/condensation in the shielding gas line
Remedy:
Dry shielding gas line
Cause:
Shielding gas flow is either too high or too low
Remedy:
Correct the shielding gas flow
Cause:
Insufficient shielding gas flow when welding starts or finishes
Remedy:
Increase gas pre-flow or gas post-flow
Cause:
Rusty or poor quality filler wire
Remedy:
Use high-quality filler wire with no impurities
Cause:
Too much parting agent applied
Remedy:
Remove superfluous parting agent / apply less parting agent
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