Tungsten Electrode - thorium tungsten electrodes, pure tungsten electrodes, lanthanium tungsten electrodes, cerium tungsten electrodes, composite tungsten electrodes


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Tungsten Electrode

What is Electrode?

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words elektron (meaning amber, from which the word electricity is derived) and hodos, a way.

Pure tungsten electrode Lanthanated tungsten electrode Thoriated tungsten electrode

Cerium tungsten electrode Zirconiated tungsten electrode

Tungsten Electrodes for TIG welding:

Tungsten electrodes are used when arc welding with the Tungsten Inert gas (TIG) process or when plasma welding. In both processes the electrode, arc and weld pool are protected from atmospheric contamination by an inert gas. A tungsten electrode is used because it can withstand very high temperatures with minimal melting or erosion. Tungsten electrodes are made by powder metallurgy and are formed to size after sintering.

TIG welding tungsten electrodes usually contain small quantities of other metallic oxides which can offer the following benefits:-

facilitate arc starting
increase arc stability
improve current-carrying capacity of the rod.
reduce the risk of weld contamination
increase electrode life

Oxides used are primarily those of zirconium, thorium, lanthanum, yttrium or cerium. Additions are usually of order 1%-4%. All these oxides greatly improve arc initiation, especially when direct current (DC) welding is employed. Thorium oxide (thoria) has been used for many years having been found effective in terms of long life and thermal efficiency. Zirconium oxide (zirconia) has been commonly used for alternating current (AC) TIG welding, normally for welding aluminium.

Type	Brand	Color	Chemical Composition（％）			Sizes (mm)	Surface	Features
Type	Brand	Color	Rare Earth	Impurities	W	Sizes (mm)	Surface	Features
Pure Tungsten	WP	Green	－	≤0.05	the rest	0.8~15	D,E G,S	Non-radioactive;suitable for AC welding of aluminum, magnesium, and their alloy
Thoriated Tungsten	WTh10	Yellow	0.9~1.1ThO2	≤0.05	the rest	0.8~15	D,E G,S	Excellent electron emission and overall performances; high current-carrying capacity; radioactivity; suitable for DC welding of carbon steel, stainless steel,nickel alloy and titanium alloy.
Thoriated Tungsten	WTh20	Red	1.8~2.2ThO2	≤0.05	the rest	0.8~15	D,E G,S
Lanthanum Tungsten	WLa10	Black	0.8~1.2La2O3	≤0.05	the rest	0.8~15	D,E G,S	Non-radioactive;excellent electric conductivity and welding capacity; high current-carrying capacity; minimum ratio of burnt area; substitute for thoriated tungsten electrode; mainly used in DC welding.
	WLa15	Golden Yellow	1.3~1.7 La2O3	≤0.05	the rest	0.8~15
	WLa20	Blue	1.8~2.2 La2O3	≤0.05	the rest	0.8~15
Cerium Tungsten	WCe10	Pink	0.8~1.2CeO2	≤0.05	the rest	0.8~15	D,E G,S	Non-radioactive;easier arc initiation under low current circumstances, and low arc-maintaining current;suitable for the welding of pipelines,small components and discontinuous welding.
	WCe15	Orange	1.3~1.7CeO2	≤0.05	the rest	0.8~15
	WCe20	Grey	1.8~2.2CeO2	≤0.05	the rest	0.8~15
Yttrium Tungsten	WY20	Sky Blue	1.8~2.2Y2O3	≤0.05	the rest	0.8~15	D,E G,S	Non-radioactive;long and slim arc beam with high compression; deeper burning groove under medium and high current circumstances.
Compound Rare Earth Tungsten	WMX	Cyan	1.0~5.0MOx	≤0.05	the rest	0.8~15	D,E G,S	Compound rare-earth tungsten electrode; different additives contributing to better performance of tungsten electrode

Note:D—As Drawn E—Electrolytic Polished G—Ground S—Swaged

More info>>

1. Catalog of Tungsten Electrode | 2. Applications of Tungsten Electrode | 3. TIG Welding | 4.GTAW

5. Tip Colors of Tungsten electrode | 6. Tungsten Rod | 7. MSDS of Tungsten Electrode

8. Quotation Table of Tungsten Electrode


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