Zirconium
Tungsten electrode has good performance in AC welding. It balls up well in AC
welding and has a more stable arc than pure tungsten. Especially with
excellent performance in high load AC welding, it is not replacable by any
other electrodes. It also resists contamination well in AC welding.
Zirconiated Tungsten is most commonly used for AC welding of aluminum and
magnesium alloys.