VANAGON archives -- March 2003, week 5 (#153)

Date:         Sun, 30 Mar 2003 13:23:54 -0500
Reply-To:     Kim Brennan <kimbrennan@MAC.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Kim Brennan <kimbrennan@MAC.COM>
Subject:      Re: A word to the wise on seam rust;
In-Reply-To:  <084701c2f62b$884d7740$319c4094@BILLPC>
Content-Type: text/plain; charset=US-ASCII; format=flowed

There are TWO types of iron oxide. Ferrous Oxide and Ferric Oxide
(different chemical make up FeO2 and Fe2O3. I never remember which is
which, but rust is one type (and is the type that spreads.) The other
type is stable (you can covert one type into the other.) The stable
stuff is black, the aggressive stuff is red.

On Saturday, March 29, 2003, at 02:43  PM, Bill N wrote:

> Well, I never said you used the wrong stuff.  I just said that iron
> oxide is rust.  Phosphoric
> acid actually works by removing the iron oxide (rust).

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