Which material is coated on pure tungsten electrode to enhance its current capacity In GTAW?
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Option 4 : Thorium
Concept:
- The Gas Tungsten Arc Welding (GTAW), is welding process in which two plates are welded using non-consumable electrode.
- The electrode is pure (uncoated) made up of Tungsten and the coating on it is made up of Thorium, Zirconium due to high current carrying capacities than Tungsten.
- Helium and Argon gases are used as shielding gas.
- Radium is used in medicine to produce Radon gas, used for cancer treatment.
- Titanium is used in manufacturing of aircraft, space craft, missiles due to its light weight.
- Manganese is used to produce variety of alloys, to deoxidize the steels and in dry cell batteries also
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