what is shielding gas

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  • What is shielding gas in welding?

  • As its name suggests, the shielding gas shields the solidifying molten weld from oxygenation as well as impurities and moisture in the air, which may weaken the corrosion-tolerance of the weld, generate porous results and weaken the durability of the weld by changing the geometrical features of the joint.

  • Can hydrogen be used as a shielding gas?

  • Hydrogen often isn鈥檛 used as a shielding gas on its own. Instead, it鈥檚 usually combined with other gases, including argon and carbon dioxide. Used in small quantities, it aids in penetration and welding speed. Many industrial applications have turned to hydrogen for stainless steel welding due to the high cost of helium.

  • What is adaptive control of shielding gas?

  • The shielding gas is among the most important factors in fusion welding, and in the context of adaptive welding, adaptive control of shielding gas has significant potential from an economic point of view and as regards environmental protection.

  • What is the composition of shielding gases?

  • Many different combinations (mixtures) of shielding gases have been developed over the years. They consists the mixtures of argon plus 1% to 5% O 2, argon plus 8% to 50% CO 2, pure CO 2, and helium, argon plus helium and tri-mix of (90% helium + 7.5% Argon + 2.5% CO 2 ).

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