NLA, Zirconiated tungsten electrodes by ProStar. AWS Spec: EWZr-1, Color Code: Brown, 3/32″ x 7 in (2.4 x 175 mm)
This electrode contains zirconium oxide, referred to as zirconia. Characteristics range between pure and thoriated tungsten, where tungsten contamination of the weld must be minimized. The electrode of choice for AC welding because it retains a balled end for welding of aluminum and magnesium alloys, and has a high resistance to contamination. Not recommended for DC applications. Zirconiated tungsten produces an extremely stable arc that reduces the likelihood of tungsten spitting in the arc.
