I installed a galvanic isolator, but they really don't help much with stray dc current, unfortunately. I do hang a large zince anode off the boat and connect to the engine ground. This anode is supposed to extend the life of the shaft anodes. I haven't noticed much difference, but most boats here have one. We do have a lot of fairly old fishing boats here so a galvanic isolator or isolation transformer is standard practice. In fact, a 77 ft wooden fishing boat just sank at the dock yesterday.
On Tue, Aug 14, 2018 at 9:59 AM, Della Barba, Joe via CnC-List < cnc-list@cnc-list.com> wrote: > Good article. > Do you use an isolator on your shore power? Really bad marinas can require > isolation transformers. > Joe > > Coquina > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *David > Castor via CnC-List > *Sent:* Tuesday, August 14, 2018 12:21 PM > *To:* cnc-list@cnc-list.com > *Cc:* David Castor <dpcas...@gmail.com> > *Subject:* [EXTERNAL] Re: Stus-List Galvanic corrosion > > > > Normally a lurker on this list, since I don't own a C&C, but thought I'd > post this link to a paper on corrosion issues by Stan Honey. > http://honeynav.com/grounding-on-sailboats/ > > > > West Marine has a version of this on their website. From my perspective > as a EE (but certainly not a corrosion expert), Stan's suggestions seem to > sum up the issues and possible remedies pretty well. > > > > There is no perfect solution, particularly regarding stray currents. At > my "hot" marina, I go through two oversized shaft anodes every 5-6 months. > > > > David Castor > > Port Angeles, WA > > > > _______________________________________________ > > 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 > > >
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