Neutral Flame

An oxyfuel gas flame in which the portion used is neither oxidizing nor reducing. See also Oxidizing Flame and Reducing Flame.

Nontransferred Arc

An arc established between the electrode and the constricting nozzle. The workpiece is not in the electrical circuit


(1) A device which directs shielding media, (2) a device that atomizes air in an arc spray gun, (3) the anode in a plasma gun, (4) the gas burning jet in a rod or wire flame spray gun.

Nozzle Accumulation

Surfacing material deposited on the inner surface and on the exit end of the nozzle.

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