I did (do) not understand it, either; and my bottom paint is not copper-based. The closest electrical appliance is the toilet a couple feet away (but that’s another thread). I figured maybe there was something going on in my marina slip due to nearby boats or other potential sources.
What I do know is that my previous bronze thru-hull was disintegrating without a ground wire, and the replacement bronze thru-hull appears to be doing fine with a ground wire. If the ground wire had not already been sitting there (installed at manufacture or by a PO), I’m not sure this solution would have even occurred to me. From: Della Barba, Joe via CnC-List Sent: Wednesday, August 15, 2018 11:40 AM To: mailto:cnc-list@cnc-list.com Cc: Della Barba, Joe Subject: Re: Stus-List Galvanic corrosion I am not sure I understand the mechanism of a bronze thru-hull in a fiberglass boat connected to a rubber hose suffering electrically caused corrosion. Possible ideas: 1. Copper in bottom paint is conducting enough to cause issues. 2. There is current in the bilge water that is carrying through to the thru-hull. 3. It is/was a crap alloy. Joe Coquina C&C 35 MK I -------------------------------------------------------------------------------- _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
