TIG or GTAW welding uses which type of electrode?

TIG (Tungsten Inert Gas) or GTAW (Gas Tungsten Arc Welding) welding primarily utilizes non-consumable electrodes, with pure tungsten and various tungsten alloys being common choices. The correct response focuses specifically on the use of 2% thoriated tungsten or zirconium electrodes, which provide beneficial characteristics for welding.

2% thoriated tungsten electrodes are favored because they maintain a stable arc and produce less spatter compared to other types of electrodes. The thorium content enhances the arc stability, especially at lower amperages, making it excellent for thinner materials and precise welding applications. Additionally, they have a higher melting point and resist contamination, which is crucial for maintaining weld quality.

While pure tungsten is also used, it does not perform as well under most conditions compared to thoriated or lanthanated options when it comes to arc stability and heat resistance. 3% lanthanated tungsten is another option that's effective, but the question specifically seeks to identify the electrode that is particularly prominent in TIG welding practices.

Silicon bronze is a filler metal commonly used with TIG welding but does not pertain to the electrode itself, making it an irrelevant choice in this context. Therefore, the correct answer highlights the suitability and essential properties