Thoriated tungsten pin is the addition of rare earth oxide thorium tungsten pin products in tungsten base through powder metallurgy and rolling polishing process produced. However, because of the thorium tungsten radioactive harm of low level, many users have to switch to other choice.
Because the characteristics of tungsten makes it very suitable for welding, and other electrode materials tiG similar such work. Adding rare earth oxides in the metal tungsten to stimulate its electronic work function, making the tungsten electrode welding performance can be improved: better performance from the arc electrodes, greater stability of the arc column electrode burning rate smaller. The rare earth additives usually ceria, lanthanum oxide, zirconium oxide, thorium oxide, yttrium oxide and the like.