TIG welding thoriated tungsten electrode has excellent comprehensive performance, especially can withstand overload current. It is easy to start the arc and not easy to deform. And it has characteristics of long service life, anti-oxidation, continuous arc during welding, stable arc, and no scattered arc.
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TIG welding thoriated tungsten electrode refers to thoriated tungsten electrode containing small quantities of thorium oxide for TIG welding.
Thorium oxide is a low level radioactive material which may give rise to both a small external radiation hazard and an internal hazard from ingestion or inhalation. The external hazard estimated for a welder holding an electrode for a whole year is a very small fraction of the maximum permissible radiation dose and it is concluded that the external radiation hazard is likely to be negligible.
There is almost no release of radioactive material during arcing. However, to achieve maximum arc stability, the electrode tip is ground to a conical point before use. This shape is maintained during use by regular regrinding. During the grinding process, particles of tungsten may be produced with thoria on the surface. It is these dust particles that create the major hazard, as they may be inhaled, and the thoria may release alpha particles from the surface.
