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Shielding gases

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Shielding gases are the gases and mixtures used to protect the weld pool from contamination from the atmosphere. They play a significant role by affecting the physical and metallurgical characteristics of the weld, the arc characteristics and the speed and ease of welding.[1] Mixtures can be purchased as premixed cylinders or they can be produced on site with the use of a gas mixer.

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References

  1. http://www.bocindustrial.co.uk/bocindustrial/technical/glossary/a.asp
  2. http://www.environics.com/Product/Gas-Blending-Gas-Delivery-Systems/

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