How should tungsten electrodes be prepared for GTAW?

Tungsten electrodes for Gas Tungsten Arc Welding (GTAW) must be ground to a point for optimal performance. This pointed tip allows for a more focused arc, which leads to greater control over the weld pool and better penetration in the base material. A fine point on the electrode helps in creating a concentrated arc which is essential for effective welding, especially on thinner materials and for precise applications.

This preparation technique enhances the stability of the arc and ensures that it can be maintained easily. Additionally, a pointed electrode reduces the heat input and allows for a cleaner and more efficient weld. Properly prepared electrodes contribute significantly to the overall quality and efficiency of the welding process.

The other processes mentioned, such as melting to a uniform shape, are not utilized in GTAW since the solid form of tungsten is integral to its performance during the welding arc. Coating with a protective layer would interfere with the electrical conductivity and effectiveness of the electrode, and cutting to size with a saw is generally not necessary as tungsten electrodes come in standard lengths and dimensions suited for many applications.