What type of electrode is used in GTAW?

In Gas Tungsten Arc Welding (GTAW), the type of electrode used is a non-consumable electrode. This means that the tungsten electrode does not melt or get consumed during the welding process. Instead, it serves as a stable source of heat, creating an arc with the workpiece that enables the melting of the base metal and any filler material if used.

The non-consumable nature of the tungsten electrode in GTAW allows for greater control over the welding process, resulting in high-quality welds with excellent penetration and minimal spatter. Since the tungsten does not melt, it can be reused multiple times, making it a cost-effective choice compared to consumable electrodes, which would need to be replaced after each use. Non-consumable electrodes also allow for a consistent arc, which is crucial for achieving precision and cleanliness in welds, especially in applications that require high strength and aesthetic appearance.

This characteristic of non-consumable electrodes sets GTAW apart from other welding processes, highlighting its unique advantages in producing high-quality welds across various applications, especially in critical industries such as aerospace and automotive.