What must be done to the tungsten electrode before GTAW?

Before starting Gas Tungsten Arc Welding (GTAW), it is essential to prepare the tungsten electrode properly to ensure optimal performance during the welding process. Grounding the tungsten to a point is crucial because it allows for a focused and concentrated arc. This sharp point facilitates a stable and consistent arc and provides better control over the heat input into the workpiece. A well-grounded electrode also aids in achieving a clean weld, reducing contamination and spatter, which can result from an improper arc.

In GTAW, the quality of the weld is largely influenced by the condition of the tungsten electrode, and having a pointed tip maximizes its effectiveness. A pointed electrode allows for a narrower arc, which is particularly useful for welding thin materials or for precision applications where control is critical. This preparation step is vital to achieving the desired welding results and maintaining the integrity of the base materials being welded.