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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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