Same bottom paint (Vivid) through all the relevant years. Dave
> On Nov 19, 2021, at 6:05 PM, Donald Kern via CnC-List <cnc-list@cnc-list.com> > wrote: > > Dave, > > Did you change the bottom paint ? > Many years ago I had the eating the anodes problem and what I determined was > the bottom paint was conductive and was setting up hull surface loops thru > the paint. Further I found that all my bronze overboards had connecting > ground wire even though the piping was all plastic/pvc. I removed all the > overboard ground wires and changed to Int'l CSC bottom paint. I now use a > single new doughnut shaft anode every year and it is approx 30-40% sacrificed > at the end of the sailing season. > > Don Kern > Fireball, C&C35 Mk2 > Bristol, RI > > > On 11/19/2021 5:11 PM, David Knecht via CnC-List wrote: >> Some may remember a Stump the Chumps post I made back in 2015. At that >> time, I had pulled the boat for the season and found that two of my three >> anodes were gone, and the third barely present, which was something that had >> never happened before. They were previously in such good shape that I had >> to decide whether to reuse them the next season or not. We decided that Joe >> deserved a prize for suggesting the idea that stray current in a marina I >> stayed at for several days had eaten the anodes. I am afraid I am going to >> have to recall the bottle of Rum that I never gave Joe. >> >> That year seemed an anomaly and every year since then, the anodes have been >> in pretty good shape at the end of the season so I presumed Joe was right >> and the problem was gone. Aries was hauled yesterday, so I went down to >> winterize and cover today. To my surprise, the situation was much like >> 2015: the prop anode was completely gone and one of the two shaft anodes was >> gone. The other was nearly completely consumed with just a bit of metal >> hanging on. What eliminates the stray current hypothesis is that I never >> plugged into shore power at any time this season. I don’t really understand >> stray currents, but I thought that if you don’t plug into shore power, you >> are not going to have this problem. Is that correct and if so, any new >> hypotheses? Nothing electrical on the boat has changed over the last 3 >> years, so it is not some new wiring that I have done. Dave >> >> S/V Aries >> 1990 C&C 34+ >> New London, CT >> >> >> >> >> >> Thanks to all of the subscribers that contributed to the list to help with >> the costs involved. If you want to show your support to the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> <https://www.paypal.me/stumurray> Thanks - Stu > > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu Dr. David Knecht Professor of Molecular and Cell Biology University of Connecticut 91 N. Eagleville Rd. Storrs, CT 06269-3125
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
