Re: Reply: [ihc] Rust intervention

[John Hofstetter <hofs@xxxxxxxxxxxx>]

On Jul 22, 2004, at 11:52 AM, John M. Adams wrote:

> > -----Original Message-----
> > From: owner-ihc@domain.elided [mailto:owner-ihc@domain.elided]On Behalf Of
> > John Hofstetter
> > Sent: Thursday, July 22, 2004 11:16 AM
> > To: Ted Borck
> > Cc: ihc-digest Digest
> > Subject: Re: Reply: [ihc] Rust intervention
> >
> >
> > I've been pondering the magnetite, but I don't remember enough organic
> > chemistry to know what I'm talking about. Another site that sells the
> > latex product calls the coating a ferro-organic which I can more 
> > easily
> > accept.
> >
> > Anyone wanting to pick on me could point out that magnetite is Ferrous
> > Oxide and that is not an organic compound, so why do I need some
> > organic chemistry knowledge. Because I want  to know how the latex
> > makes the Ferric Oxide into Ferrous Oxide.
> >
> > John
> >
> > John Hofstetter
> > Ol' Saline
> > www.goldrush.com/~hofs
>
> I've been following this thread (or trying to - I don't have a 
> chemistry
> background), and I've ended up confused.
>
> I have always used naval jelly (phosphoric acid) to deal with rust. My
> understanding was that it converted ferrous oxide to ferric oxide. Do 
> I have
> this backwards? Or, John, is your last sentence reversed? Also, I 
> found this
> on the web, adding to my befuddlement:
>
> a) FeO = ferrous oxide
>
> b) Fe2O3 = ferric oxide, hematite, and red iron oxide
>
> c) Fe3O4 = ferrous ferric oxide, magnetite, and black iron oxide
>
> So magnetite is a combination of the two? Is that what the blackening 
> is
> from naval jelly?
>
> Thanks for any help...  ~John A.
Yes, careless mistake. Hopefully, momentary butter slipping off of my 
noodles.

 I meant Ferrous ferric oxide which is magnetite. The Ferrous ferric 
oxide is something like Fe+++2Fe++O4 which is quite different than FeO.

Sorry, and thanks for catching it.

John Hofstetter
Ol' Saline
www.goldrush.com/~hofs