Why are fluxes not used in GTAW?

The use of fluxes in welding processes serves to protect the molten weld pool from atmospheric contamination, among other functions. However, in Gas Tungsten Arc Welding (GTAW), fluxes are not required because the process utilizes an inert gas, typically argon or helium, to shield the weld area. This inert gas prevents oxidation and contamination while allowing for a clean and high-quality weld.

Since GTAW targets achieving clean welds without the need for any additional materials to shield the area, the use of fluxes becomes unnecessary. The design of GTAW, which centers around the application of an inert gas and a non-consumable tungsten electrode, inherently provides the protection needed for the welding process, making flux superfluous. Thus, the correct answer reflects the inherent efficacy of the GTAW process in creating clean welds without relying on fluxes.