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Date: | Tue, 26 Sep 2017 13:06:10 -0400 |
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mixed n2 and co2 are great for welding (TIG or MIG), but not common
for soldering... CO2 form carbide, N2 for nitride that great for
grain refinement, but soldering temp might not enough for form such
inclusion (compare to steel...) and very little benefit comes for
such inclusion, if you want high conductivity of solder (not like
steels, mechanical strength is major concern for welding). N2/H2 is
better, N2 mostly provent to form oxide (oxide is bad in terms
electrical conductivity), H2 provide reducing effect if it is high
enough temp... of course, you an use some sort of catalytic effect
to get H2 dissociation temperature down to the soldering
temperature... fluxless soldering can happen if H2 content is high
enough... IMHO.
On Sep 26, 2017, at 11:16 AM, Alasdair Green wrote:
> Nitrogen is a cheap inert gas which is collected as part of
> liquefaction of oxygen. Argon is expensive, and CO2 is not
> traditionally captured.
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