Which potentially dangerous fumes can be produced during GTAW?

During Gas Tungsten Arc Welding (GTAW), one of the potentially dangerous fumes that can be produced includes ozone, especially when using electric arcs that generate high temperatures. The formation of ozone occurs when ultraviolet light from the welding arc interacts with oxygen in the air. This gas can lead to respiratory issues and is hazardous in high concentrations.

Additionally, thorium dust can also be a concern, specifically when using tungsten electrodes that contain thorium. While thorium contributes to the mechanical properties of the tungsten electrode, it poses health risks when respirable thorium dust becomes airborne during the welding process. Inhalation of thorium dust can lead to radiation exposure and potential health problems.

Understanding the chemical interactions and potential hazards in the welding environment is crucial for maintaining safety protocols and implementing effective ventilation systems.