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10.03 TIG Welding Problems
Weld quality is dependent on the selection of the correct consumables, maintenance of equipment and proper
welding technique.
Description
Possible Cause
Remedy
1 Excessive
beard
build-up or poor
penetration or poor
fusion at edges
of weld.
Welding current is too low.
Increase weld current and/or
faulty joint preparation.
2 Weld bead too wide
and flat or undercut
at edges of weld or
excessive
burn through.
Welding current is too high.
Decrease weld current.
3 Weld bead too small
or insufficient
penetration or
ripples in bead are
widely spaced apart.
Travel speed too fast.
Reduce travel speed.
4 Weld bead too wide
or excessive bead
build up or excessive
penetration in butt
joint.
Travel speed too slow.
Increase travel speed.
5 Uneven leg length in
fillet joint.
Wrong placement of filler rod. Re-position filler rod.
6 Electrode
melts
when arc is struck.
Electrode is connected to the
‘+’ terminal.
Connect the electrode to the
‘
−
’ terminal.
7 Dirty weld pool.
A Electrode contaminated
through contact with work
piece or filler
rod material.
A Clean the electrode by
grinding off the contaminates.
B Gas contaminated with air.
B Check gas lines for cuts and
loose fitting or change gas
cylinder.
