Without checking the electroactivity, could it be oxygen? Another copper leak situation in which I was involved was attributed to high oxygen in the water, from the ground source; not introduced after mining.
James-Osbourne: Holmes -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Friday, November 02, 2001 12:53 PM To: [email protected] Subject: Re: CS>On the Corrosion of Copper in DW In a message dated 11/2/2001 10:49:27 AM Eastern Standard Time, [email protected] writes: Subj:Re: CS>On the Corrosion of Copper in DW Date:11/2/2001 10:49:27 AM Eastern Standard Time From: [email protected] <mailto:[email protected]> Reply-to: [email protected] <mailto:[email protected]> To: [email protected] <mailto:[email protected]> Sent from the Internet The solubility of copper goes way up as ph goes down. See http://www.nsf.org/newsletters/plumbing99-1/coppercert.html Although copper is slightly soluble in pure wter, I think much of the problem with distilled water may be that it can quickly absorb enough CO2 to drop the ph into the region where copper is quite soluble. Marshall Marshall: I still need to know what's going to oxidize copper (even slightly) to form Cu++ when only CO2 is present in DW. Roger
