Gas Tungsten Arc welding is better known as TIG welding. TIG is an abbreviation for ”Tungsten Inert Gas”.
Gas Tungsten Arc welding is a process where the tungsten electrode is not consumed, and where it is common to add additives to improve the weld performance.
The heat from the electronic arc welder heats the material and the weld pool itself is protected by a shielding gas. During TIG welding the oxide cleaning action is poor, wherefore the heat input and the process time will help protect the weld pool and prevent weld oxidation. In the most favourable of cases the quantities of oxide will be so small that aluminium can be welded (aluminium will strongly oxide when mixed with hydrocarbons.)
A detail for a chair is being welded, using the TIG welding process. High precision is an absolute must when welding small details, equally so when it comes to fixation.