inert gas-shielded arc welding

inert gas-shielded arc welding

[i′nərt ¦gas ¦shēld·əd ′ärk ‚weld·iŋ]
(metallurgy)
An arc-welding process in which the weld area is shielded by an inert gas to prevent oxidation. Also known as Heliarc welding.