Composite Tungsten Electrodes
Composite tungsten electrodes are electrodes adding two or two more rare earth oxides into tungsten, which are complementary to better their welding performance. Thus, they become extraordinary in electrodes family.
Following table is to show a kind of composite tungsten electrodes.
| Electrode Name |
Trade Mark |
Added Impurity |
Impurity Quantity |
Other Impurities |
Tungsten | Electric Discharged Power |
Color Sign |
| Composite Electrode |
WRex | ReOx | 1.00 - 4.00% | <0.20% | The rest | 2.45 - 3.1 | Pink or cyan |
There are different standards for composite tungsten electrodes. National standard IS06848 and American standard AWSA5.12 are two of them. The surface condition of composite tungsten electrodes is glabrous, clean, no default (fissure, palling), no burrs, and no inner defects on the fracture surface and no oil fouling.
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Their performances can be much improved by adding two or more rare earth oxides which are mutually complementary.
Cerium tungsten electrodes are tungsten electrodes with 2% CeO2, which are non-radioactive materials.
Thoriated tungsten electrodes are electrodes made of tungsten and thoria by different proportion and the most widely used ones are 2% thoriated tungsten electrodes.
Zirconiated tungsten electrode is also called the tungsten zirconiated electrode.