pneumatician
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A METAL INDISSOLUBLE IN...
NITRIC
HCL
SULFURIC
AQUA REGIA
EXIST??????????? if yes or no what uses for this metal???? (beyond the tipical uses of electric contacts in computers, photocameras...)
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kecskesajt
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Ruthenium.It doesnt dissolve in aqua regia.But it dissolves in... House hold bleach 
Nurdrage have a video about it.
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fluorescence
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I think Ruthenium is pretty inert towards Aqua Regia and probably to the rest of these, too.
But there is always something that will attack a metal. There is also a difference between
beeing attacked by an acid an really dissolving in it. If you think about fluorine containers.
They would react witht elemental fluorine but as soon as they do they build up a layer of fluoride
that protects the metal under it.
Edit: kecskesajt was faster 
[Edited on 20-8-2015 by fluorescence]
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BromicAcid
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In terms of alloys, two 'common' choices: Elgiloy (Possibly) or Inconel (best). Even Hastelloy C the normal go-to does not hold up to that range.
Check out this compatibility chart:
www.balseal.com/sites/default/files/tr60c_020707132612.pdf
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kecskesajt
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Quote: Originally posted by fluorescence  | I think Ruthenium is pretty inert towards Aqua Regia and probably to the rest of these, too.
But there is always something that will attack a metal. There is also a difference between
beeing attacked by an acid an really dissolving in it. If you think about fluorine containers.
They would react witht elemental fluorine but as soon as they do they build up a layer of fluoride
that protects the metal under it.
Edit: kecskesajt was faster
[Edited on 20-8-2015 by fluorescence] |
2 minutes faster.
Its like:You start to write a comment on 09:42,but you dont see I post it on 09:43 and it takes 3 mins to write.
Happens me quite a lot time.
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ave369
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Tungsten. Very slowly reacts with aqua regia, sulfuric and hydrochloric acids as bulk metal. Powdered tungsten is somewhat more active.
Smells like ammonia....
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Mabus
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Iridium.
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Bert
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Thread Moved
20-8-2015 at 06:07 |
aga
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i'm still wondering what 'indissoluble' means.
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battoussai114
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Niobium and , I think, tantalum can withstand attack from acqua regia.
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diddi
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I have dissolved Ru in hypochlorite, but it is slow and produces a black insoluble material. I don't know of any other ways of getting it to dissolve,
though.
Have not tried any of the refractory metals in acids yet, but I would not expect much reactivity.
Beginning construction of periodic table display
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BromicAcid
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Portmanteau between insoluble and indivisible?
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pneumatician
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what is "indissoluble"
http://www.thefreedictionary.com/indissoluble
thanks I checked your suggestions, here is a result, I rated from 1-10 the resistence to acids, aqua regia... and of course things less corrosive like
air, water...
Ruthenium -> 2 “oxidizes explosively”
Tungsten -> 6 but warm aqua regia eats
http://www.tungsten.com/chemical-resistance-of-tungsten/
Iridium -> 7 but “attacked by molten salts, such as NaCl and NaCN.”
http://periodic.lanl.gov/77.shtml
Niobium -> 0 react with air!!!
http://periodic.lanl.gov/60.shtml
Tantalum -> 4 good promise but ataked by sulfur trioxide, in Beijing, Mexico D. F... this metal is like an ice cube in Sahara
http://periodic.lanl.gov/73.shtml
Elgiloy
Inconel
Hastelloy C
alloys
Under aqua regia the resistence is “acceptable” 
so maybe the "best" is rhodium
http://goldrefiningforum.com/~goldrefi/phpBB3/viewtopic.php?...
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aga
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Woo ! It is actually a word.
Thankyou for that. I had never heard of that word, ever.
Why do you want a metal that will not be touched by aqua regia ?
Are you making a Giant Gold refinery ?
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battoussai114
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Actually, that would be Neodimyiun (Nd). While Niobium will also oxidize in air, it only happens around 200C, and while it does tolerate the acids and
oxidizing acid mixtures, like acqua regia, it can't handle fluoride ions, so HF and its mixes as well as any possibly acidified fluorine salt will
wreak havoc.
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pneumatician
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| Quote: Originally posted by aga | Why do you want a metal that will not be touched by aqua regia ?
Are you making a Giant Gold refinery ? |
no of course is for a comic.
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aga
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Easy: Kryptonium
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