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Porosity of weld seam
Cause:
Spattering in the gas nozzle, causing inadequate gas shield for weld seam
Remedy:
Remove welding spatter
Cause:
Holes in gas hose or imprecise gas hose connection
Remedy:
Replace gas hose
Cause:
O-ring at central connector is cut or faulty
Remedy:
Replace O-ring
Cause:
Moisture/condensate in the gas line
Remedy:
Dry gas line
Cause:
Gas flow too strong or weak
Remedy:
Correct gas flow
Cause:
Inadequate quantity of gas at the start or end of welding
Remedy:
Increase gas pre-flow and gas post-flow
Cause:
Too much parting agent applied
Remedy:
Remove excess parting agent/apply less parting agent
Poor ignition properties
Cause:
Unsuitable tungsten electrode (e.g., WP electrode for DC welding)
Remedy:
Use suitable tungsten electrode
Cause:
Wearing parts loose
Remedy:
Screw on wearing parts tightly
Gas nozzle is cracked
Cause:
Tungsten electrode not protruding far enough out of the gas nozzle
Remedy:
Have tungsten electrode protrude more out of the gas nozzle
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