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Buying a Boat | Pat's Boating in Canada

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First question here as I am having trouble getting a decent answer anywhere else, such as boat service workshops. I wish to reduce corrosion on an aluminium hull over its lifetime, hence this question. Especially since corrosion being the most canadaa reason of hull degradation for aluminium boats. Hull fittings: All electrical equipment problems with aluminum hull boats canada the boat is not returned through the hull, but through a return wire to the negative on the battery.

Also, all dissimilar metal fittings are insulated with rubber or the like from the the hull. Some aluminium boats develop corrosion spots, and others do not. I would rather the boat does not - and just develop a nice even oxidisation layer.

I met an old guy at the boat ramp years ago and he had the best condition aluminium hull I had ever seen. He recommended polishing the hull and problems with aluminum hull boats canada earthing the hull when not in use.

If I earth the hull to a ground spike when not in use will it reduce or increase corrosion on the hull? I made up prlblems ground spike out of 5ft of reinforcing bar and an old car jumpstart cable, put together with solder.

With the earthing alligator clip not connected to the boat, when I measured the voltage between the hull and the problems with aluminum hull boats canada spike I get about 4 volts. I did not measure the current. Edit and my apologies, I confused this from the notes I took fault finding something draining the battery of my truck the same day. TLDR: grounding in the electrical sense by itself does very little to prevent corrosion, but given grounding means metal touches metal in practice, proper choice of grounding metals can help protect from further corrosion by the cathodic protection effect.

I don't have experience with aluminum boats, and this site is focused on explaining physics aspect of things, not on giving practical advice, but this is quite interesting physics so take the following more as a physicist's viewpoint on the corrosion and protection processes, not as an experience-based advice.

There are several different kinds of corrosion processes, but it seems corrosion due to aluminium reacting with oxygen and water from atmosphere is the most relevant for you. Available sources on aluminum corrosion see e. If the pH of the environment is too extreme, pitting or much deeper and faster aluminum corrosion may happen. Also slowing down the oxidization process should help evenness - after polishing and cleaning the surface, I would let the protective layer grow under a roof, or at least start the process there, preventing rain and dust from attacking the hull.

Dust and rain may expose the hull to a soup of chemicals which could affect the corrosion process unevenly. Grounding makes potential of the hull the same as that of the ground. If the boat will spend a lot of time outdoors, grounding it seems like a good thing to do, to decrease likelihood of a thunder strike, and by aith thick grounding bar and thick cables to make it more resilient in case it does get hit.

If grounding problems with aluminum hull boats canada are connected at several places along the boat, it could help to prevent occurrence of strong electric currents across different metals there, but this seems unlikely to provide much benefit, especially if all different metals are already insulated from each other as they problems with aluminum hull boats canada be.

However, in general, grounding aluminum parts can be problematic and high maintenance, because of the oxide layer that can grow on its surface between the hull and canadx grounding cable clip. Aluminum oxide is hkll bad alumonum oxides usually areand with time, electric resistance of the connection will grow and eventually it may disconnect electrically and the boat won't be well grounded.

You should check resistance between the grounding bar and the hull while grounded - it problems with aluminum hull boats canada probably grow in time but you shouldn't let it get too high. Another problem with grounding is that corrosion can actually be accelerated near the points where the clips bite into the aluminum, due to electrochemical cell effect.

The clips should be either the probles aluminum alloy as the hull, or a metal that is more prone to corrosion, so they will corrode but the hull corrosion won't be accelerated. There is so-called galvanic series that helps to choose the metal that can safely touch the protected body without causing its corrosion: for an aluminum boat, such metal could be magnesium-aluminum alloy or zinc, if the hull alloy to be protected is low on zinc [2].

There is a so-called cathodic protection problems with aluminum hull boats canada [3], where metallic surface that is to be protected from corrosion is touching a problemw sacrificial anode on the same side, which is usually a compact piece of different, more corrosion-prone metal.

Aluminuj more of such anodes, the better the protection effect. The effect is strongest near the anodes. You could try this practice with the problems with aluminum hull boats canada - it should auminum slow down or almost stop the corrosion hulk the hull, if you getting it into good contact with many pieces of zinc or magnesium-aluminium alloy.

So, grounding the hull can either help or hurt its corrosion because of introducing different metals. The important circumstance is which metals are used. As far as I know, there is no global effect on corrosion due to hull's potential being the same as the ground. Sign up to join gull community. The best answers are voted up canad rise to the top.

Stack Overflow for Teams � Collaborate and share knowledge with a private group. Create a free Hul What is Teams? Learn. Will earthing an aluminium boat reduce the wit of hull corrosion? Ask Question. Asked 11 months ago. Active 1 month ago. Viewed times. Also, the battery isolation switch is left in the off state when not in use.

The hull sits on plastic rails on a trailer when not in use. Canara and my apologies, I confused this from the notes I took fault finding something draining the battery of my truck the same day Am I doing good or damage to my hull having it earthed? Improve this question. Daniel Alexander Daniel Alexander prolems 2 2 bronze badges. If the boat is totally insulated from everything except the ground strap, then there should be no current in the ground strap.

You say that problems with aluminum hull boats canada is on hkll trailer? I would maybe try using some dry wooden shims to lift the boat off of the trailer at different points and figure out how to break the circuit. I was candaa something draining my truck battery the same day and was using the same notebook.

But now that you mention it, I should probably check for any current. I better check. Add a comment. Active Oldest Votes. Long answer: I don't have experience with aluminum boats, and this site is focused on explaining physics aspect of things, not on giving practical advice, but this is quite interesting physics so take the following Problems With Aluminum Hull Boats With more as a physicist's viewpoint on the corrosion and protection processes, not withh an experience-based advice.

Aluminum corrosion There are several different kinds of corrosion processes, but it seems corrosion due to aluminium reacting with oxygen and water from atmosphere is the most relevant for you.

Grounding Grounding makes potential huull the hull the same as that of the ground. Alyminum with grounding However, in general, grounding aluminum parts can be problematic and high maintenance, because of the oxide layer that can grow on its surface between the hull and the grounding cable clip. Corrosion and grounding Another problem with grounding boatd that corrosion can actually be accelerated near problems with aluminum hull boats canada points where the clips bite into the aluminum, due to electrochemical cell effect.

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Post as a guest Name. Email Required, but never shown. Featured wth Meta. Stack Overflow alukinum Teams is now free for up to 50 users, forever. Related 1. Hot Network Questions. Question feed. Physics Xluminum Exchange works best with JavaScript enabled. Accept all cookies Customize settings.

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A high-finish versions of this technique operate the woven Spectra problems with aluminum hull boats canada Kevlar taffeta. Good right away which I have put these upon right here, boats over forty feet have been compulsory to have the created rubbish devise as well as directed towards avocation for adhering to which plan, a seashore ensure models have influences from the series of utterly opposite kinds of boat architecture?

Sign up for a new account in our community. It's easy! Already have an account? Sign in here. View New. Search In. WTB -alumacraft trophy bow cushions Cody Started 1 minute ago.

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Apr May Jun Jul Prev 1 2 Next Page 1 of 2. Recommended Posts. Posted December 16, Link to post Share on other sites. How do I check for currents? Posted December 17, First one is in the back of boat near the plug were there was no foam [ Post made via iPhone ]. Shakemsam 12 Posted December 17, LongLine 42 Posted December 17, Was that foam ever wet?

Any smell? Tom B. LongLine 42 Posted December 18, Posted December 18, Good luck with it. Shakemsam 12 Posted December 19, Posted December 19, I would advise against the idea of plastic between the foam and hull.

Water under the floor is unavoidable and it is important to allow air to dry it out. When I installed new foam, I laid it so it only rested on the ribs, allowing almost an inch between the foam and the hull. Big Dave 16 Posted December 19, LongLine 42 Posted December 20, Posted December 20, Not a good idea to plan on swimming to shore in Lake Ontario.

I would not advise that strategy. If it ever dries Also it would help if you make sure to pull your drain plug after every retrieval. Thanks guys [ Post made via iPhone ]. Shakemsam 12 Posted December 20, The foam also provides a leveling surface for the floor. Excavtr 0 Posted December 21, Posted December 21, Good luck! Wil keep ya updated and show some pics when I'm done [ Post made via iPhone ].

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Okay, thanks. But in many cases, the size and cost of the boat don't rate the time of a professional. If this is the case the next time you look at a used boat, make sure to check for these ten common issues. Photo by Simon Dannhauer on Pond5. The owner of this used boat unsuccessfully attempted to seal these deck cracks with resin; water leaked through and saturated the foam in the hull.

The give-away was the fact that even when unloaded, the boat's scuppers sat at the waterline instead of above it. In this rather extreme example, the fittings have corroded away and the rubrail has come loose, exposing the hull to deck joint completely. Don't expect this one to keep the water out. When buying a used boat, remember: Buyer Beware. Back Explore View All.

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