I forgot to mention one thing that might be related to the zinc problem. Mid-season, I hit a rock while racing. When the boat was pulled, the lead was exposed in an area of about 10 square inches. Could that cause zinc corrosion? I can see that could create current to the keel bolts, but how would it get from there to the zincs? Dave
On Dec 24, 2015, at 12:21 PM, Russ & Melody via CnC-List <cnc-list@cnc-list.com> wrote: > > Hi David, > > Normally zinc decay over the course of a year is attributed to galvanic > corrosion, whereas stray current corrosion can happen rapidly and be very > destructive. A change in Galvanic decay is usually associated with a change > in underwater metals (new prop maybe) or area salinity. > > Having said that... I suggest a review of these two primers and then inspect > your bilge pump wiring very thoroughly looking for the slightest of corrosion > and replace anything in the damp area that is suspect and NO JOINTS BELOW THE > SOLE, please. > > http://www.pcmarinesurveys.com/AC%20DC%20electrolysis.htm > > https://www.youtube.com/watch?v=b3VBBml2J0I > > Cheers and Merry Christmas to all, Russ > Sweet 35 mk-1 > > > > At 08:47 AM 24/12/2015, you wrote: >> When my boat was pulled from the water this year I was surprised to find >> that the Max-prop zinc was gone, one of the shaft zincs was gone and the >> other was nearly gone. I have had this configuration in past years and >> every other year at the end of the season I could barely justify replacing >> them because there was so little metal decay. I know of nothing I did >> differently this year. I am on a mooring so rarely plugged into shore >> power. What would cause a dramatic increase in zinc decay? Thanks and >> Happy Holidays to all! Dave >> >> Aries >> 1990 C&C 34+ >> New London, CT >> >> >> >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the bottom >> of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > Dr. David Knecht Professor of Molecular and Cell Biology Core Microscopy Facility Director University of Connecticut 91 N. Eagleville Rd. Storrs, CT 06269 860-486-2200
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