Electrolysis - what to look for?

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Post Options Post Options   Likes (0) Likes(0)   Quote MacSkipper Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2014 at 10:20am
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Titanium
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I use a battery switch - isolates battery from electrics when boat stored - means no possibility of stray currents while boat stored and should help keep battery alive as well.

I would have thought outboard main cause as dissimilar metals to aluminium boat - should outboard be grounded to boat and anode on boat as well - to cover off when in water?
Good fishing trip nothing breaks, great trip catch fish.
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Post Options Post Options   Likes (0) Likes(0)   Quote Lethal Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2014 at 10:28am
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Rest In Peace
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dont wire them to the boat,
use a baz bar to attach your wires to and use silicon or rubber washers or even both between hull when bolting any stainless steel to your hull,



how to use a Buz bar, you will need two of them, one Positive and one Earth,
run your Positive and Earth from your battery to a Buz bar and all your wire is attached from here to what ever your likely to run...
name each wire with what it is attached to, run the fuse between the Buz Bar and what ever your running,
can make for quick repairs and peace of mind, helps when it comes to resale as well...

Thanks for everything you did for us Eric. may you rest in peace, You were one of the real legends of NZ recreational fishing
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2014 at 10:30am
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I forgot to add that I had electrolysis in my boat.  It was caused by buoyancy foam inside the hull and presumably some leaky electrics.  The foam was retaining a small amount of moisture, and presumably the electricity was forcing electrolysis.  It's also possible that the foam mix was slighty acidic, and this was enough to drive the electrolysis in the absence of electrical current.

I stripped all the electrics, blasted all the foam out of the boat, acid washed and rinsed the hull twice  and redid all the electrics.  I was very careful to isolate all the electrics from the hull.  No problems since then.
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Post Options Post Options   Likes (0) Likes(0)   Quote MacSkipper Quote  Post ReplyReply Direct Link To This Post Posted: 16 Dec 2014 at 11:46am
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Titanium
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Geez Mike Aqua think I will keep my plastic boat after all....
Good fishing trip nothing breaks, great trip catch fish.
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 17 Dec 2014 at 10:34am
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Just don't have two-pot foam in a wet or potentially wet area in an alloy boat - or you will need it.  Even 'closed cell' foam holds some moisture.

Note my boat was 12 years old at that point and was used >100 days per year.  The foam had been in for ~5 years. 

That was all 15 years ago and no recurrences. 
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Post Options Post Options   Likes (0) Likes(0)   Quote Don18025 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 9:46am
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If you do cook your alloy boat with electrolysis they are easy to recycle by the scrap metal guys.
If you own a wooden or glass hull, then electroloysis is mainly going to attack your engine.
Electrolysis can damage wooden hulls at skin fittings and fastenings but those hulls have been in the water for a very long time.
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