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That welding looks incredibly clean almost no tarnishing what so ever.
Is this all because of the inert nature argon or the fact that the argon is cooling the weld quicker reducing oxidation.
It seems to be a shame to paint it
Can I ask about the tubing is 853 main triangle and columbus and deda rear stays? This option seems to me popular amongst framebuilders but may I ask why?
wildwest-
Yeah, mostly, I think. I am very much NOT a trained engineer, I just buy tooling and slowly get less bad at using it. This is worth a read for general tinting info, although it's specifically about stainless. @Scilly.Suffolk can probably give more info, as can @mdcc_tester as he is an insufferable know-it-all ;)
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Argon is a better insulator than air so i doubt it is an instrinsic property of the gas that is cooling the weld better than the surrounding atmosphere. The argon flow might be cooler than the surrounding atmosphere as it is decompressed from the bottle...
My guess would be the non-reactivity of the Argon being the driver for the nice clean welds.
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fidbod
So tig welding needs argon, and best practice is argon front and back. Front from the torch, back from a back purge in the heat sink. Building one frame at a time you dont think about how much argon you are using, but 30 odd is going to add up, so this week I'm trying to get a precise flow rate for optimal coverage, and working out how to seal the frames as well as possible. This isn't a isen frame, but is being built as if it was, if that makes sense.... You can see from how silvery the welds are there is plenty of argon to go around, so I'll turn it down a bit and do the other side.