SailNet Community - View Single Post - Electrolysis/Corrosion on my Prop
View Single Post
post #2 of Old 03-06-2006
Chesapeake Sailor
wwilson's Avatar
Join Date: Jul 2000
Location: Herrington Harbor, MD
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 17

The stray a/c can be difficult to find.

Did the propeller/shaft have anodes when you purchased the boat?

Your propeller installation probably has one (or more) sacrificial zinc anodes. Make sure that you keep an eye on their decay once you have installed the new prop. This may require a dive once a month or so. If the a/c near your dock is suspected to be high - move the boat to anchorage before diving on the prop/shaft. If the decay rate is such that the anode(s) will be less than 40-50 percent before your next scheduled haul, you will have to move the boat, or find the stray current. Talk to the marina operator - they may be helpful.

Propeller replacement is expensive enough that if the decay continues at a rapid pace, you should hire a marine electrical technician to help you find the source, or at least verify that it is not coming from your own equipment.


Last edited by wwilson; 03-06-2006 at 11:37 AM.
wwilson is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome