[TheForge] coal or charcoal morph to Evaporust

[robert hensarling]

You mean to tell me that my family is drinking phosphoric acid?  Oh wait,
don't have a family cept the wife.  You mean to tell me that my wife and I
are drinking  phosphoric acid?  So I gave up beer because of the alcohol,
and took on Dr. Peppers and Pepsi's, the hard stuff, none of the sissy
"diet" stuff. (at 205 I should look at the diet stuff, but the taste isn't
there).  I got off topic:
I'm drinking phosphoric acid?



----- Original Message ----- 
From: "James Binnion" <jbin at well.com>
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Wednesday, June 25, 2008 2:18 PM
Subject: Re: [TheForge] coal or charcoal morph to Evaporust


>
> On Jun 24, 2008, at 9:51 PM, Peter Hirst wrote:
>
> > Frosty:  you answered your own question on the phosphoric acid.
> > Nasty stuff in any strength.
>
> It is used in many food products at the appropriate dilution (think
> soft drinks)
>
>
> >  Not sure it would work in electrolyte bath.  The electrolysis tends
> > to redeposit the iron back onto itself, while the phosphoric acid
> > tends to dissolve the elemental iron.  The chemical action of the
> > acid and the electrlysis are two different reactions.  The sole
> > function of the ion in the bath is to conduct electricity, which in
> > turn exactly reverses what happens in the the creation of ferric
> > oxide -oxidation. Phosphoric acid dissolves the iron itself, which
> > is why its used to etch for other fininsh preps.
>
> The rust dissolving nature of your electrolytic setup is from the
> reduction of the iron oxide (rust) back to iron by the atomic hydrogen
> liberated at the cathode(-) from the electrolysis of the water in your
> electrolyte. If you use an acid like phosphoric in the electrolyte
> solution you will end up dissolving the anode(-) into the electrolyte
> and those ions will then plate out on the workpiece which you really
> don't want them to do. This is the basis for electroplating but your
> electrolyte will not be a very good plating solution and you will end
> up with all kinds of junk firmly attached to your work piece.
>
> James Binnion
> jbin at well.com
>
>
>
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