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Posted by Christopher Tidy on January 24, 2008, 6:36 pm
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Hi folks,
I'm looking for a few etched specimens of common metals to photograph
under a microscope. Preferably including one or two which show a
microstructure which is visually pretty simple. Examples I'd be
interested in obtaining include cold rolled low carbon steel, normalised
low carbon steel, normalised medium carbon steel, grey and white cast
iron, annealed brass, etc. I'm not looking to spend a lot of money.
Anyone know where I might obtain some?
Another possibility would be to obtain some concentrated nitric acid in
order to make the nitric acid and ethanol mix required for etching most
ferrous metals myself, but concentrated nitric acid doesn't seem easy to
obtain.
Any suggestions? Thoughts would be appreciated.
Best wishes,
Chris
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Posted by David Littlewood on January 24, 2008, 7:38 pm
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>Hi folks,
>
>I'm looking for a few etched specimens of common metals to photograph
>under a microscope. Preferably including one or two which show a
>microstructure which is visually pretty simple. Examples I'd be
>interested in obtaining include cold rolled low carbon steel,
>normalised low carbon steel, normalised medium carbon steel, grey and
>white cast iron, annealed brass, etc. I'm not looking to spend a lot of
>money. Anyone know where I might obtain some?
>
>Another possibility would be to obtain some concentrated nitric acid in
>order to make the nitric acid and ethanol mix required for etching most
>ferrous metals myself, but concentrated nitric acid doesn't seem easy
>to obtain.
>
>Any suggestions? Thoughts would be appreciated.
>
>Best wishes,
>
>Chris
>
Chris,
Where do you live? Contact me off-list (replace "nospam.demon" above
with "dlittlewood").
For your DIY solution, if that proves to be the route you choose, you
can get nitric acid from jewellers suppliers. It's pretty nasty stuff
though, and its vapour will corrode anything within spitting distance.
David
--
David Littlewood
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Posted by Christopher Tidy on January 26, 2008, 11:41 pm
Please log in for more thread options David Littlewood wrote:
<snip>
> Where do you live? Contact me off-list (replace "nospam.demon" above
> with "dlittlewood").
>
> For your DIY solution, if that proves to be the route you choose, you
> can get nitric acid from jewellers suppliers. It's pretty nasty stuff
> though, and its vapour will corrode anything within spitting distance.
Thanks. I've sent you an e-mail.
Best wishes,
Chris
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Posted by Peter Fairbrother on January 25, 2008, 4:25 am
Please log in for more thread options Christopher Tidy wrote:
> Hi folks,
>
> I'm looking for a few etched specimens of common metals to photograph
> under a microscope. Preferably including one or two which show a
> microstructure which is visually pretty simple. Examples I'd be
> interested in obtaining include cold rolled low carbon steel, normalised
> low carbon steel, normalised medium carbon steel, grey and white cast
> iron, annealed brass, etc. I'm not looking to spend a lot of money.
> Anyone know where I might obtain some?
>
> Another possibility would be to obtain some concentrated nitric acid in
> order to make the nitric acid and ethanol mix required for etching most
> ferrous metals myself, but concentrated nitric acid doesn't seem easy to
> obtain.
>
> Any suggestions? Thoughts would be appreciated.
You can buy nitric acid from lpchemicals, but they have a minimum £50
order (plus carriage and VAT).
If you are anywhere near Trowbridge, Wiltshire, I can let you have some.
But I can't post it :(
-- Peter Fairbrother
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Posted by Norman Billingham on January 25, 2008, 6:25 am
Please log in for more thread options
> Christopher Tidy wrote:
>> Hi folks,
>>
>> I'm looking for a few etched specimens of common metals to photograph
>> under a microscope. Preferably including one or two which show a
>> microstructure which is visually pretty simple. Examples I'd be
>> interested in obtaining include cold rolled low carbon steel, normalised
>> low carbon steel, normalised medium carbon steel, grey and white cast
>> iron, annealed brass, etc. I'm not looking to spend a lot of money.
>> Anyone know where I might obtain some?
>>
>> Another possibility would be to obtain some concentrated nitric acid in
>> order to make the nitric acid and ethanol mix required for etching most
>> ferrous metals myself, but concentrated nitric acid doesn't seem easy to
>> obtain.
>>
>> Any suggestions? Thoughts would be appreciated.
>
>
> You can buy nitric acid from lpchemicals, but they have a minimum £50
> order (plus carriage and VAT).
Mixing nitric acid and ethanol os an excellent way of making substantial
explosions - I've twice seen the front of a fume cupboard and once the
window of a laboratory blown out by accidental mixing of concentrated nitric
acid with alcohol. In fact in 40 years of working in chemistry labs this
has been the single most common cause of explosions I have encountered.
Have a look at
http://www.ab.ust.hk/sepo/tips/ls/ls005.htm
But don't even attempt it unless you have a great deal of expertise and a
safe environment, particularly not with acid and alcohol of unknown purity
and provenance - it's about as dangerous as home chemistry can get.
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>
>I'm looking for a few etched specimens of common metals to photograph
>under a microscope. Preferably including one or two which show a
>microstructure which is visually pretty simple. Examples I'd be
>interested in obtaining include cold rolled low carbon steel,
>normalised low carbon steel, normalised medium carbon steel, grey and
>white cast iron, annealed brass, etc. I'm not looking to spend a lot of
>money. Anyone know where I might obtain some?
>
>Another possibility would be to obtain some concentrated nitric acid in
>order to make the nitric acid and ethanol mix required for etching most
>ferrous metals myself, but concentrated nitric acid doesn't seem easy
>to obtain.
>
>Any suggestions? Thoughts would be appreciated.
>
>Best wishes,
>
>Chris
>