A device for controlling the delivery of gas at some substantially constant pressure.
Welding Tech
A device at the exit end of the torch or gun that directs shielding gas.
An arc welding process wherein coalescence is produced by heating with an arc between a continuous filler metal (consumable) electrode and the work. Shielding is obtained entirely from an externally supplied gas, or gas mixture. Some methods of this process are called MIG (Metal Inert Gas) or CO2 welding. MIG welding requires the use of an inert shield gas.
Shielding gas atoms that, in the presence of an electrical current, lose one or more electrons and therefore, carry a positive electrical charge. The provide a more electrically conductive path for the arc between the electrode and the work piece.
The condition between rubbing surfaces where high spots or protrusions on a surface become friction welded to the mating surface, resulting in spalling and further deterioration.