„FreePatentsOnline
Protective gas shroud for welding
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Argon is commonly used as the inert cover gas, since it is heavier than air. It is common practice to place the object being welded in a "purge box", which is a sealed chamber open at the top. Argon is metered into the bottom of the box, and flows out the top. The object to be welded is placed in the box, and is completely immersed in the argon. The open top allows the argon to displace the air by pushing it out from the bottom, and also allows access by the welder.“
( http://www.freepatentsonline.com/6037563.html )


„Termotehnika Procesna oprema Zavarivanje
Zavarivanje raznorodnih materijala
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Primenom TIG postupka bronza se zavaruje sa ugljeničnim ili legiranim austenitnim čelikom , tantal Ta sa titanom Ti. Za zavarivanje titana Ti i tantala Ta koristi se dopunska zaštita ili zavarivanje u komorama sa kontrolisanom atmosferom gasa argona, tj zaštitni gas je argon.“
( http://www.termozavar.com/zavarivanje_praksa.html )