Fault
Insufficient shielding
gas
Pores in weld material
Seam "boils" (unsteady
arc)
TIG electrode melts
24
Possible cause
Welding torch leaking
Gas hose not securely connected
Pressure reducer incorrectly set or
defective
Welding torch leaking
Gas nozzle not securely connected
Torch head defective
Workpiece soiled with grease, rust, oil,
etc.
Draughts
No gas supply
Wrong gas
Welding current set too high for electrode
diameter
Poles reversed and TIG torch connected
to +ve pole [4]
Remedy
Check, replace if necessary
Connect the gas hose securely
Check, replace if necessary
Check, replace if necessary
Connect the gas nozzle securely
Check, replace if necessary
Clean
Shield the workplace
Check
Use the correct gas
Set the correct welding current
Connect TIG torch to the -ve pole [3]