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
