[Sca-cooks] Salt corrosion of pots?
Galefridus Peregrinus
galefridus at optimum.net
Sun Jan 13 14:11:51 PST 2013
But why would whether the pot was glazed or not have anything to do with it? Glazed or not, earthenware is basically fused silica, which is, as I said, pretty much inert. What is the salt eating into that's making the fired clay crumbly? I'm enough of a chemist to know that SOMETHING odd is going on.
-- Galefridus
> Message: 5
> Date: Sun, 13 Jan 2013 13:14:01 -0500
> From: Johnna Holloway <johnnae at mac.com>
> To: Cooks within the SCA <sca-cooks at lists.ansteorra.org>
> Subject: Re: [Sca-cooks] Salt corrosion of pots?
> Message-ID: <8AE2DA53-67EC-480F-BD0E-2984FAB1C340 at mac.com>
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>
> I think the problem is that your pot was unglazed.
>
> Johnnae
>
> Sent from my iPad
>
> On Jan 12, 2013, at 8:44 PM, Galefridus Peregrinus <galefridus at optimum.net> wrote:
>
>> I have a couple of Pomaireware unglazed clay pots (http://pomaireware.com/clay-cookware/) that I use with some regularity. Most recently I used one to brine cure a few pounds of olives. Over the course of the cure (about 3 months), the brine solution soaked through the pot; in fact, the outside of the pot became encrusted with salt as the brine dried.
>>
>> A couple of days ago, I transferred the olives to another container. As I was cleaning the pot, I noticed several places where the clay had corroded: it had become soft and crumbly. I didn't think that fired clay pots would be affected by salt in this way. I'm no ceramicist, but isn't fired clay just fused silica, which is extremely inert?
>>
>> I'd be interested in hearing whether anyone else has had this problem.
>
>
> ------------------------------
>
> Message: 6
> Date: Sun, 13 Jan 2013 14:07:58 -0500 (EST)
> From: JIMCHEVAL at aol.com
> To: sca-cooks at lists.ansteorra.org
> Subject: Re: [Sca-cooks] Salt corrosion of pots?
> Message-ID: <2d9d.4ee9d664.3e24600e at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Indeed. "Inert" does not mean "not porous".
>
> "One important use of glaze is to render porous pottery vessels
> impermeable to water and other liquids."
> _http://en.wikipedia.org/wiki/Pottery#Decorating_and_glazing_
> (http://en.wikipedia.org/wiki/Pottery#Decorating_and_glazing)
>
> Jim Chevallier
> www.chezjim.com
>
> Newly translated from Pierre Jean-Baptiste Le Grand d'Aussy:
> Eggs, Cheese and Butter in Old Regime France
>
>
> In a message dated 1/13/2013 10:14:13 A.M. Pacific Standard Time,
> johnnae at mac.com writes:
>
> I think the problem is that your pot was unglazed.
>
>
>
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