Which electrode type is associated with radioactive dust hazard when ground?

Which electrode type is associated with radioactive dust hazard when ground?

• A. Nickel-based electrodes
• B. Copperclad electrodes
• C. Thoriated tungsten electrodes
• D. Carbon electrodes

Answer: (C)

Radioactive dust hazard comes from thorium-containing electrodes. Thoriated tungsten electrodes add thorium oxide to improve arc starting and emission. When you grind or shape these electrodes, you create fine thorium-containing dust that can be inhaled or ingested, exposing you to radiation risks over time. That’s why thoriated tungsten is associated with a radioactive dust hazard when ground. Other electrode types listed don’t contain thorium, so they don’t present this specific radiation risk from grinding, though they may have their own unrelated hazards. To reduce risk when grinding thoriated tungsten, use proper ventilation and dust control, and consider using non-radioactive electrode options if feasible.

Radioactive dust hazard comes from thorium-containing electrodes. Thoriated tungsten electrodes add thorium oxide to improve arc starting and emission. When you grind or shape these electrodes, you create fine thorium-containing dust that can be inhaled or ingested, exposing you to radiation risks over time. That’s why thoriated tungsten is associated with a radioactive dust hazard when ground. Other electrode types listed don’t contain thorium, so they don’t present this specific radiation risk from grinding, though they may have their own unrelated hazards. To reduce risk when grinding thoriated tungsten, use proper ventilation and dust control, and consider using non-radioactive electrode options if feasible.