Message-Id: <v01540b01af4212867bcc@[192.174.2.170]>
Date: Tue, 4 Mar 1997 18:56:43 +0100
To: pinhole
From: emuller@exploratorium.edu (Eric Muller)
Subject: re: Reacting to pennies
>Date: Mon, 3 Mar 1997 22:16:03 -0500 (EST)
>From: NFetter@aol.com
>To: emuller@exploratorium.edu
>Subject: Rotten Pennies
>
>Hi Eric, The question about pennies corroding in a mixture of vinegar and
>salt. What kind of pennies were they? The 'new'pennies are mostly zinc and
>any exposure of this metal will cause the penny to corrode in this mixture.
>As time passes things only get worse. Any scratch or imperfection exposes the
>zinc.
>
> Neil Fetter
Eric Muller
Teacher-In-Residence
Exploratorium
3601 Lyon St.
San Francisco, CA 94123
415-561-0313
email:emuller@exploratorium.edu