Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: A METAL INDISSOLUBLE IN...
pneumatician
Hazard to Others
***




Posts: 411
Registered: 27-5-2013
Location: Magonia
Member Is Offline

Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **

[*] posted on 19-8-2015 at 20:38
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...)
View user's profile View All Posts By User
kecskesajt
Hazard to Others
***




Posts: 299
Registered: 7-12-2014
Location: Hungary
Member Is Offline

Mood: No Mood

[*] posted on 19-8-2015 at 23:43


Ruthenium.It doesnt dissolve in aqua regia.But it dissolves in... House hold bleach :P
Nurdrage have a video about it.
View user's profile View All Posts By User
fluorescence
Hazard to Others
***




Posts: 285
Registered: 11-11-2013
Member Is Offline

Mood: So cold outside

[*] posted on 19-8-2015 at 23:45


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 :D

[Edited on 20-8-2015 by fluorescence]
View user's profile View All Posts By User
BromicAcid
International Hazard
*****




Posts: 3241
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline

Mood: Rock n' Roll

[*] posted on 20-8-2015 at 03:30


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




Shamelessly plugging my attempts at writing fiction: http://www.robvincent.org
View user's profile Visit user's homepage View All Posts By User
kecskesajt
Hazard to Others
***




Posts: 299
Registered: 7-12-2014
Location: Hungary
Member Is Offline

Mood: No Mood

[*] posted on 20-8-2015 at 03:32


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 :D

[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.
View user's profile View All Posts By User
ave369
Eastern European Lady of Mad Science
****




Posts: 596
Registered: 8-7-2015
Location: No Location
Member Is Offline

Mood: No Mood

[*] posted on 20-8-2015 at 05:32


Tungsten. Very slowly reacts with aqua regia, sulfuric and hydrochloric acids as bulk metal. Powdered tungsten is somewhat more active.



Smells like ammonia....
View user's profile View All Posts By User
Mabus
Wiki Master
***




Posts: 238
Registered: 3-11-2013
Member Is Offline

Mood: Energetic

[*] posted on 20-8-2015 at 05:59


Iridium.



View user's profile View All Posts By User
Bert
Super Administrator
Thread Moved
20-8-2015 at 06:07
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 20-8-2015 at 11:11


i'm still wondering what 'indissoluble' means.



View user's profile View All Posts By User
battoussai114
Hazard to Others
***




Posts: 235
Registered: 18-2-2015
Member Is Offline

Mood: Not bad.... Not bad.

[*] posted on 20-8-2015 at 16:18


Niobium and , I think, tantalum can withstand attack from acqua regia.
View user's profile View All Posts By User
diddi
National Hazard
****




Posts: 723
Registered: 23-9-2014
Location: Victoria, Australia
Member Is Offline

Mood: Fluorescent

[*] posted on 20-8-2015 at 17:52


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
View user's profile View All Posts By User
BromicAcid
International Hazard
*****




Posts: 3241
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline

Mood: Rock n' Roll

[*] posted on 20-8-2015 at 18:54


Quote: Originally posted by aga  
i'm still wondering what 'indissoluble' means.


Portmanteau between insoluble and indivisible?




Shamelessly plugging my attempts at writing fiction: http://www.robvincent.org
View user's profile Visit user's homepage View All Posts By User
pneumatician
Hazard to Others
***




Posts: 411
Registered: 27-5-2013
Location: Magonia
Member Is Offline

Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **

[*] posted on 21-8-2015 at 15:46



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 :D
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?...

View user's profile View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 21-8-2015 at 16:33


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 ?




View user's profile View All Posts By User
battoussai114
Hazard to Others
***




Posts: 235
Registered: 18-2-2015
Member Is Offline

Mood: Not bad.... Not bad.

[*] posted on 22-8-2015 at 09:51


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.
View user's profile View All Posts By User
pneumatician
Hazard to Others
***




Posts: 411
Registered: 27-5-2013
Location: Magonia
Member Is Offline

Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **

thumbup.gif posted on 3-9-2015 at 06:09


Quote: Originally posted by aga  
Woo ! It is actually a word.

Thankyou for that. I had never heard of that word, ever.


:)

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.
View user's profile View All Posts By User
aga
Forum Drunkard
*****




Posts: 7030
Registered: 25-3-2014
Member Is Offline


[*] posted on 3-9-2015 at 10:48


Easy: Kryptonium



View user's profile View All Posts By User

  Go To Top