OK that's why the zinc lasted only a year.should last much longer in fresh water.a conductive medium is required: as conductivity of the medium increases from truly fresh water to seawater with about 3% sodium chloride content so increases the need for corrosion protection of the copper alloy prop, which is the main reason we use sacrificial zincs on our boats.to protect the copper alloy prop
_____ From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Joel Aronson Sent: November 28, 2013 12:16 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List installing shaft zincs Its brackish. Joel 35/3 Annapolis On Thu, Nov 28, 2013 at 10:51 AM, dwight veinot <dwight...@gmail.com> wrote: Is the Upper Chesapeake truly fresh or is it brackish? Dwight Veinot Alianna C&C 35 MKII Head of St. Margaret's Bay, NS On Thu, Nov 28, 2013 at 11:09 AM, TOM VINCENT <tvince...@msn.com> wrote: I have a martec folding prop and install their bullet shaped zinc each spring, they recommend the zinc be installed next to the strut within 1/4" to 3/8". The zinc lasts me the entire year, I sail on the Upper Chesapeake Bay which is fresh water. Tom Frolic II 36' cb Chesapeake City, MD _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com -- Joel 301 541 8551 _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2247 / Virus Database: 3629/6374 - Release Date: 11/28/13
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