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Old 01-24-2005
Silmaril Silmaril is offline
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To bond or not to bond?

Interesting thought. What would your objectives be for the "un-bobnding" project? Is there something you are wishing to accomplish that bonding would interfere with? Worried about the horror stories of a lighning strike blowing bonded through hulls clean off the hull? Is the upkeep of your present bonding becoming too costly in respect to it''s stated benefits?

My boat is what you may call "partially bonded" in that some systems are bonded, while others are not. I have all of my electrical, my engine, prop shaft, mast, standing rigging, and steel hull matrix bonded. I also use a galvanic isolator in my shore power circuit.

Things that are not bonded in my boat are life lines, stanchons, seacocks, fuel tank (diesel), water tank, and hydraulics (Navtech backstay and vang). I don''t think it matters but I replaced my 27 year old bronze through hulls (which showed no signs of corrosion or brittleness) with marlon.

I found that once I completed the bonding of the first group of items, along with the galvanic isolator, I started to get better performance from all of my electronics (VHF, GPS, full NEXUS Wind/Speed/Depth/Data, stereo, charger) longer life on my zincs (the isolator is to blame for that) better battery performance as indicated by my LINK 20 Dual Bank Monitor, and less corrosion at the other bonded parts.

Of course, much of the increase in performance may be due to the complete PROPER rewiring of the entire boat at the same time. The previous owners had made a mess of things over the 24 or so years prior to my taking on the project.

In my opinion, there are definate advantages of some things being bonded, while others may be less appearant.
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