Which welding process utilizes a non-consumable electrode?

The welding process that utilizes a non-consumable electrode is Gas Tungsten Arc Welding (GTAW). In GTAW, a tungsten electrode is used to create an arc between the electrode and the workpiece, providing the heat necessary to melt the base metals. The key characteristic of GTAW is that the tungsten electrode does not melt during the welding process, which distinguishes it from other welding methods that use consumable electrodes.

In GTAW, the heat generated by the arc is focused and controlled, allowing for precise and high-quality welds, especially in applications that require great care, such as in stainless steel or aerospace structural components. The process also often involves the use of a filler material that can be added separately, allowing for versatility in welding various joints and thicknesses of materials.

This non-consumable nature of the electrode in GTAW makes it particularly advantageous for achieving clean welds with minimal contamination, as the electrode itself does not introduce any additional materials into the weld pool that could affect the quality of the weld.