Potential problems with the process include the following:

A.      Tungsten inclusions might occur if the electrode is allowed to contact the weld pool.

B.      Contamination of the weld metal might occur if appropriate shielding of the filler metal by the gas stream is not maintained.

C.      There is low acceptance for contaminants on filler or base metals.

D.     Possible contamination or porosity is caused by coolant leakage from water-cooled torches.

E.      Arc deflection or Arc blow, as with other processes.