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Aluminium
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Albert
science forum beginner


Joined: 02 May 2005
Posts: 32

PostPosted: Sun Jul 16, 2006 4:13 am    Post subject: Aluminium Reply with quote

Does aluminium turn black when heated? I'm pretty sure it does, though
I'm not confident
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G. R. L. Cowan
science forum addict


Joined: 30 Apr 2005
Posts: 50

PostPosted: Sun Jul 16, 2006 1:59 pm    Post subject: Re: Aluminium Reply with quote

Albert wrote:
Quote:

Does aluminium turn black when heated? I'm pretty sure it does, though
I'm not confident

I've seen old B&W footage of liquid aluminum being poured in air.
It did not appear to be luminous (one would not expect it to be,
since it melts at 660 Celsius and incandescence has a vaguely
defined lower limit of visibility near 800 Celsius,
depending on how much other light there is) but was highly reflective.

Food containers made of aluminum may have a lacquer that turns black.


--- G. R. L. Cowan, former hydrogen fan
Boron: internal combustion without exhaust gas:
http://www.eagle.ca/~gcowan/Paper_for_11th_CHC.html
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Dr Ivan D. Reid
science forum beginner


Joined: 01 Jun 2005
Posts: 14

PostPosted: Sun Jul 16, 2006 4:27 pm    Post subject: Re: Aluminium Reply with quote

On 15 Jul 2006 21:13:19 -0700, Albert <albert.xtheunknown0@gmail.com>
wrote in <1153023199.125134.87260@b28g2000cwb.googlegroups.com>:
Quote:
Does aluminium turn black when heated? I'm pretty sure it does, though
I'm not confident

I think some alloys do, but in general I've just seen them go
from solid to liquid (perhaps with some "skin") quite unexpectedly
when heated, with no physical forewarning.

--
Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
KotPT -- "for stupidity above and beyond the call of duty".
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