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Weld seam porosity
Cause:
Spatter build-up in the gas nozzle causing inadequate gas-shielding
of the weld seam
Remedy:
Remove welding spatter
Cause:
Either the protective gas shield hose has holes in it, or the hose is not
connected properly
Remedy:
Replace protective gas shield hose
Cause:
The O-ring seals on the connection points have been cut through or
are faulty
Remedy:
Replace the O-ring seals
Cause:
Moisture/condensation in the protective gas shield line
Remedy:
Dry protective gas shield line
Cause:
Protective gas shield flow is either too high or too low
Remedy:
Correct the protective gas shield flow
Cause:
Insufficient protective gas shield flow rate when welding starts or fi-
nishes
Remedy:
Increase gas pre-flow and gas post-flow
Cause:
Rusty or poor quality wire electrode
Remedy:
Use high-quality wire electrode with no impurities
Cause:
For gas-cooled welding torches: protective gas is escaping through a
non-insulated inner liner
Remedy:
Use only insulated inner liners with gas-cooled welding torches
Cause:
Too much parting agent applied
Remedy:
Remove excess parting agent/apply less parting agent
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