Remove ferric chloride stains with Coca-Cola?

M

mc

Guest
This afternoon, at the lab, I removed a ferric chloride stain from the
workbench with a paste of citric acid and water (given 2 hours to work).

Reading up on the chemistry, I see indications that a mixture of citric and
phosphoric acids should work better...

....which means Coca-Cola should remove ferric chloride stains. Has anybody
tried it?

Also, oxalic acid is supposed to be very effective. It is the active
ingredient in Bar Keepers Friend powdered cleanser. (Bar Keepers Friend
liquid is citric acid.)

The idea is to convert FeCl into another iron salt that is light-colored and
highly soluble in water.

Any other favorite remedies? (Other than to etch the printed circuit boards
with ammonium persulfate instead?)
 
"mc" <look@www.ai.uga.edu.for.address> wrote in message
news:2Ckbj.22179$k27.20904@bignews2.bellsouth.net...
This afternoon, at the lab, I removed a ferric chloride stain
from the
workbench with a paste of citric acid and water (given 2 hours
to work).

Reading up on the chemistry, I see indications that a mixture
of citric and
phosphoric acids should work better...

...which means Coca-Cola should remove ferric chloride stains.
Has anybody
tried it?

Also, oxalic acid is supposed to be very effective. It is the
active
ingredient in Bar Keepers Friend powdered cleanser. (Bar
Keepers Friend
liquid is citric acid.)

The idea is to convert FeCl into another iron salt that is
light-colored and
highly soluble in water.

Any other favorite remedies? (Other than to etch the printed
circuit boards
with ammonium persulfate instead?)
Click to expand...
etch with CuCl instead ?

i guess i will get zapped for responding as this is the wrong
group ? maybe misc or basics better

hth
 
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mc wrote:
This afternoon, at the lab, I removed a ferric chloride stain from the
workbench with a paste of citric acid and water (given 2 hours to work).

Reading up on the chemistry, I see indications that a mixture of citric and
phosphoric acids should work better...

...which means Coca-Cola should remove ferric chloride stains. Has anybody
tried it?
Click to expand...
I'm sure the acid ingredients in the Cola would do a great job at
removing the stains (they do it well enough to teeth), though the
colourings and flavours probably stain worse than the FeCl, especially if
you use a wooden bench.

I'm sure that ebay will be able to supply you with small quantities of
these various acids.

The Wikipedia mentions in http://en.wikipedia.org/wiki/Phosphoric_acid
that you can buy a jelly-like compound of phosphoric acid, called naval
jelly, made exactly for the job of removing rust stains.

A note at the bottom under 'Other applications' mentions:
Phosphoric acid is used as a flux by hobbyists (such as model
railroaders) as an aid to soldering.
Click to expand...

- --
Brendan Gillatt
brendan {at} brendangillatt {dot} co {dot} uk
http://www.brendangillatt.co.uk
PGP Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBACD7433
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"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote in
message news:476E4754.D5CB583D@hotmail.com...
robb wrote:
etch with CuCl instead ?
You can't etch copper with a copper salt.
Graham
Click to expand...
oops my bad ...

i was meaning to talk about using Cupric Chloride or CuCl2
(aq) solution i suppose as a regenerate-able copper etchant and
that can be made simply as a result of using easily available
Hydrochloric + Peroxide etchant and regenerate with air bubbles
or other faster means ...

no ferruc chloride stains and there is plenty of info on the web
about it.....

here is a good link so that i do not mis-inform
see
http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html

did i improve Eeyore ? :)
hth
robb
 
Brendan Gillatt wrote:
(snip)
The Wikipedia mentions in http://en.wikipedia.org/wiki/Phosphoric_acid
that you can buy a jelly-like compound of phosphoric acid, called naval
jelly, made exactly for the job of removing rust stains.
(snip)

- --
Brendan Gillatt
(snip)
Click to expand...


Interesting. The last bottle of Naval Jelly that I bought was specifically for
removing rust from steel and leaving a surface that allows primer to adhere
well.

---
Michael
 
mc wrote:
This afternoon, at the lab, I removed a ferric chloride stain from the
workbench with a paste of citric acid and water (given 2 hours to work).
Click to expand...
Thanks for posting that - it's surprising, and gives one hope.

I thought the only way to remove ferric chloride stains
was with an axe, or an explosive charge, or a flamethrower -
something like that. :)

Ed
 
Michael wrote:
Interesting. The last bottle of Naval Jelly that I bought was specifically for
removing rust from steel and leaving a surface that allows primer to adhere
well.
Click to expand...

Ospho http://www.ospho.com/


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
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