Model	Oxide addition		Impurites	Tungsten	Color	Standard
	Principal oxide	Contents
WZr3	ZrO₂	0.2-0.4	≤0.1	Blalance		AWS A5.12 ISO6848 EN 26 848
WZr8	ZrO₂	0.7-0.9	≤0.1	Blalance

Zirconiated tungsten electrode is the most commonly used in alternating current welding, which contains little zirconium oxide. Its electron work function is 2.5eV-3.0eV. Zirconiated tungsten electrode performs well, and it is easier to start arc than pure tungsten. Arcis stableaswell.It can also prevent and control pollution well. Current-carrying capacity is quite good as well. The biggest characteristic of this electrode is that its top can keep globular to reduce the seepage of tungsten in the high load current and it also has good corrosion resistance, The superior of zirconiated tungsten electron cannot be replaced by other electrode.