What is a common result of insufficient shielding gas flow during GTAW?

Insufficient shielding gas flow during Gas Tungsten Arc Welding (GTAW) can result in the oxidation of tungsten. In this welding process, the shielding gas, usually argon or a mixture that includes argon, serves a critical role in protecting the weld area from atmospheric contamination and oxidation. The tungsten electrode, being a non-consumable part of the welding process, is particularly vulnerable to oxidation when not adequately protected.

When the gas flow is inadequate, the protective atmosphere around the weld area is compromised, allowing oxygen and nitrogen from the air to come into contact with the tungsten. This leads to the formation of oxides on the tungsten surface, which can diminish the performance of the electrode, reduce arc stability, and negatively affect the overall quality of the weld.

Understanding the importance of proper shielding gas flow is essential for maintaining the integrity of the tungsten electrode and ensuring high-quality welds in GTAW applications.