> From: [email protected] Woodgate > Sent: Tuesday, January 15, 2008 9:50 AM > Tarver, Peter" writes: > > >I'm unconvinced that the table > >is based on any valid scientific studies. > > Further down, you said that the tables you reviewed relate to > brackish or sea water.
I said "vast majority," to imply "vast majority." Nothing exclusive about that. I entirely agree that the Annex J > table doesn't apply under those conditions. As I indicated, > it applies only under strict laboratory conditions, in the > absence of all anions, such as chloride and sulfate. The > concentration of any soluble or gaseous participant in the > electro-chemistry matters as well. Perhaps, but then ยง1.1.2, first dashed paragraph addresses at least some of this. > I have some data from 'Kaye and Laby' 14th edition (old), > which is indicative. The standard electrode potential (SEP) > of silver versus hydrogen (taken as the 0 V reference) is 0.8 > V, but if chloride ions are present, the value drops to 0.22 > V, indicating an increased tendency to corrode. Perhaps I'm mistaken, but I recall there being more than a couple of generally used or accept reference electrodes (depending on use environment and personal preference) and the choice of electrode makes a difference in the potentials obtained (though can be corrected for, under many circumstances). The missing specifics of the test methods also lead me to question the data in the table of Annex J. But then, we're saying much the same thing. Regards, Peter L. Tarver, PE [email protected] CONFIDENTIALITY This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited. If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof. ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
