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In gas tungsten are welding process, the material coated on pure tungsten electron to enhance its current carrying capacity is
  • a)
    Titanium
  • b)
    Manganese
  • c)
    Radium
  • d)
    Thorium
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In gas tungsten are welding process, the material coated on pure tungs...
  • Pure tungsten electrode offers shorter life than coated electrodes because of rapid wear and tear of pure tungsten electrode owing to thermal damage caused by their low current carrying capacity.
  • Pure tungsten electrodes are frequently coated oxides of Th, Zr, La & Ce. These oxides are expected to perform two important function.
1. increasing arc stability
2. Increasing the current carrying capacity of the electrodes.
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In gas tungsten are welding process, the material coated on pure tungsten electron to enhance its current carrying capacity isa)Titaniumb)Manganesec)Radiumd)ThoriumCorrect answer is option 'D'. Can you explain this answer?
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