Thoriated Tungsten Electrode
Tungsten electrode with thorium oxide has excellent ignition performance and resistance, but contains radioactive thorium. Therefore, it is now largely replaced by other materials due to health risks.
Physical-Chemical Mechanism of Action
The tungsten electrode with thorium oxide consists of a tungsten rod core coated with thorium dioxide. The thorium oxide improves ignition performance and the electrode's resistance to chemical influences.
Metallurgical Relevance & Welding Risks
Thorium is a radioactive isotope that poses health risks during the manufacture and use of thorium-doped tungsten electrodes. Prolonged exposure can increase cancer risk. Therefore, alternative electrode materials without radioactive substances are preferred today.
Workshop Practice & Handling Instructions
Use thorium-doped tungsten electrodes only for special applications and under strict safety measures. Ensure proper electrode coverage and compliance with workplace safety regulations. If replacement with safer materials like lanthanum or zirconium tungsten electrodes is needed, consult the workshop supervisor.