RE: Reply: [ihc] Rust intervention

["John M. Adams" <jma@xxxxxxxxxxx>]

> -----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.