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Old 10-02-2017, 06:42 PM   #41
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That is a beautiful roll and tip job. Impressive. Keep up the pics!
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Old 10-06-2017, 09:06 PM   #42
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Nice work! I always like to learn from others. I have just learned I have a leaking starboard side aluminum fuel tank on my boat (Oh Joy!). I was wondering what the coal tar epoxy does for the aluminum tank. It seems to me the most likely cause of corrosion would come from water in the fuel. That is of course if the tank was installed with an air gap all around so water can't collect. (Mine wasn't). My tanks aren't coated with anything as far as I can tell but seem to have lasted a pretty long time. My boat is a '78 model.

Kevin
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Old 10-06-2017, 09:49 PM   #43
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At some point we realize what we are doing is more for the next owner than ourselves.
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Old Yesterday, 10:18 AM   #44
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Quote:
Originally Posted by tallswede View Post
Nice work! I always like to learn from others. I have just learned I have a leaking starboard side aluminum fuel tank on my boat (Oh Joy!). I was wondering what the coal tar epoxy does for the aluminum tank. It seems to me the most likely cause of corrosion would come from water in the fuel. That is of course if the tank was installed with an air gap all around so water can't collect. (Mine wasn't). My tanks aren't coated with anything as far as I can tell but seem to have lasted a pretty long time. My boat is a '78 model.

Kevin
When I had my aft starboard tank replaced last year I asked the tank fabricator what is used to coat the tank and he said coal tar epoxy. So I bought a gallon and coated it my self.

I also noticed the other aft port tank had a black coating but all of the other tanks were bare aluminum. The PO said they had one tank replaced but couldn't remember which one. I assumed it was the black coated one.

Foam was glued to the tank bottom and sides and I believe water/moisture got between the foam and the tank. Most of the foam fell off when the tank was removed. There was corrosion on the bottom of the tank in several spots in addition to the leak. I had the bottom of the tank cut off and there was no corrosion to the interior of the tank.
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