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 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
