FY-TECH FY-4200/2E - Troubleshooting Porosity; Causes and Corrective Actions for Porosity

2、Porosity
Porosity:
Small cavities or holes resulting from gas pockets in weld metal.
Insufficient shielding gas at welding
arc.
Increase flow of shielding gas at regulator /
flowmeter and/or prevent drafts near welding
arc.
Remove spatter from gun nozzle.
Check gas hoses for leaks.
Adjust nozzle distance from workpiece.
Hold gun near bead at end of weld until molten
metal solidifies.
Use welding grade shielding gas ;change to
different gas.
Use clean,dry welding wire.
Eliminate pick up of oil or lubricant on
welding wire from feeder or liner.
Remove all grease, oil,moisture,rust,paint,
coatings,and dirt from work surface before
welding.
Use a more highly deoxidizing welding wire
(contact supplier)
Do not extend wire too far beyond nozzle.
Wrong gas
Dirty welding wire
Workpiece dirty
Welding wire extends too far out of
nozzle
Possible Causes
Corrective Actions
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