Re: What form of matter will last the longest? (OT)
From: Angelo (patrik56_at_libero.it)
Date: 07/20/04
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Date: 20 Jul 2004 01:17:20 -0700
Uncle Al <UncleAl0@hate.spam.net> wrote in message news:<40FC575F.4DEE8DE4@hate.spam.net>...
> Angelo wrote:
> >
> > Uncle Al <UncleAl0@hate.spam.net> wrote in message news:<40FB1755.82E84E8E@hate.spam.net>...
> >
> > (snip higher levels)
Thanks alot for your answer!
(snip)
> > > <http://www.haynesintl.com/C2000alloy/C2000folder.htm>
> > > <http://members.rogers.com/acidmanual/materials_metals_c2000.htm>
> > > http://www.haynesintl.com/pdf/h2111.pdf>
> >
> > Yes, I see it hard for an analytical tech, as you say.
> > Anyway, from organic or inorganic point of view, it may come to
> > mind using superacids, i.e. FSO3H--SbF5--SO3 or
> > HF--SbF5, to cite the commonest (not for you Uncle Al, of course).
> > Don't you think they could dissolve such a coupon of C-2000 in
> > a reasonable time?
>
> No. Look at how the alloy was designed. Nothing hits it.
I've seen the first two links you provided but, as far as I can remember
there are no test against superacids, hence my doubt.
> Acidity by itself doesn't do anything - it's the redox
Ok, but a (solvatet) H(+) activity increase, also increases oxidizing
power. I think that when Hammet's H_0 goes significantly beyond
the values for the previously cited superacids, well, I begin to
seriously figure out a suitable container :-)
> potential. You might have some luck with a strongly coordinating
> ligand and bubbling air through, maybe adding a catalytic redox
> couple like Cu(I,II) or Fe(II,III), but I doubt it.
Right, I recall these well thought strategies.
> 316SS is physically weak and chemically reactive, but it
Sorry, don't know about 316SS, nor other species you cite below,
but I trust you, of course.
> withstands most everything anybody commonly throws at it. Heck,
> 6061-T6 aluminum is all over the place, and zinc-based pot
> metal. They survive. Can you even begin to imagine what
Sorry again, (I told you about my level of English understanding)
I couldn't catch even a pale clue in the following sentence, after
the question mark, but I don't expect you bother to explain or
rephrase it, of course :-))
> Hastelloy C-2000 will withstand? It would be a superb grave
> marker if you took care of the weight (hollowed, of course) with
> a proper footing.
(snip)
> Kinda pricey and prone to irreversible reduction.
You are (obviously) right again, but after my 'BTW' I somewhat
stopped to consider price or other contingent (?) factors.
AuF5 in liquid HF (solubility allowing) may be operated at temps as
low as -84 Celsius, wherein (may be) the irreversible decomposition
could be frozen.
> PtF6 is another violently powerful electron sucker. Look what it
> does to oxygen or xenon.
I have to apologize: forgotten to say that during and after Ph.D I
worked in between inorganic and organometallic research field
(whereas before organic and ionic gas phase chemistry were the
main fields); so I know what a beast is PtF6 and its not so obvious
chemistry with the species you cite.
Thank you again for your attention,
Angelo
P.S. - All my best wishes for your very well thought Eotvos
experiment !
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