Anodes are Good, Corrosion is Bad... Aluminium Boat 101 Chuffed Special 

Finally, someone who knows the corrosion subject and can explain it really well. Thanks.

I’ve heard this explained many times, but never this clearly. Thanks!

Girl talking about technical aspects.., amazing! ))

I'm in a fiberglass monohull...37 ft Ketch....after watching the Finnish people in their Aluminum vessel I now want one....thanks for explaining about Aluminum.....sail safe

Seeing some of the corrosion damage and all the other issues that Chuffed had I was very skeptical that you would ever be able to do all the renovation work that she needed ! Now that I know how much work has been done and the time you have put into it I know I was wrong, you are one of the most determined and tenacious people I have ever heard of, you are an inspiration to us all !

Thumbs up! After 30 years living on or just sailing around the globe that was the best simple explanation ever. Top marks

Great Video! I learned more in 8 minutes about aluminum than I ever though I could.. great job on explaining everything.

Well done, very informative video....you guys rock! Thanks, Andrew

Always loved and adored it when the scientist inside shoe comes out... Thank you professor I truly appreciate it when you are able to actually explain things to us individuals that are missing a couple of molecules it's always during Lee one of your fans forever

Well done! Superb explanation of all that info about corrosion and its various types. I only stumbled on your channel today, I will stay to learn more.

Wow, I was just searching some info regarding aluminium.. came out over your video and I enjoyed it so much! Very nice info about corrosion and video itself is such nicely made. You got yourself a subscriber right away :)

Great presentation of the decomposition potential regarding Aluminium, best I've seen. Thanks.

Doctor you have got to be the most noble person I know of on the internet and believe me I watch a lot of sailing channels and you are the queen of nobility

haha most people just talk about the difference in the nobility of metals, of course the good doctor talks about the difference in potential electrochemical voltage, which is the correct way to explain galvanic corrosion. Be sure to get a galvanic isolator for your shore power connection - it will stop stray currents from other boats from eating away at your boat/anodes when it is on shore power.

Very interesting, thanks. It’s interesting that you’ve painted the bottom of the hull. I wonder if you considered just leaving it bare and increasing the anode mass to compensate. A small chip in that coating and you could get rapid corrosion at that spot due to high proportion of the coated surface (which will become the cathodic site) compared to the chip (which will become the anoxic site).

Outstanding! Thank you for taking the time to explain this :-)

You are a sweetheart. Very knowledgeable. Settled a problem for us. Thank you

Learnt a lot from this video. Thanks.

Hoooo, finally a very clear explanation... thank you Dr. Sheddy :)

Brief, simple and extremely informative. Always understood the concept and problem of electrolysis in construction and boating. Was great to learn a bit more about the differing natural degree of positive or negative charge in various metals. Fun to know. Thanks. Chuff is your biggest patient. Good luck-Gday.

Very nicely done! That was one of the best explanations i have ever heard. I am glad you mentioned stray current in marinas. Electrocution due to stray current at marinas is the biggest reason I don't ever swim at a marina (even more dangerous in bodies of fresh water). So glad you are putting good zincs on chuffed. She will thank you!

You are awesome! Informative and entertaining. Aloha!

Good job! Thanks!

Very good video with 1st hand experience and information.

A "must" on an aluminum (or steel) boat is an isolation transformer. Not a galvanic isolator, that helps too, but an isolation transformer. Only this a 100% protection against stray currents in a marina, from either faulty marina installations or faulty installations on other boats.

Thank you for a very informative vid👍🏾

Thank you for the clear explanation!

At last a clear explanation on electrolysis!

..., je t'adore DOCTEUR, continue ainsi BRAVO!

I had to pause the video to comment how informative this is, thanks, great work, I'm subscribed now :)

Really good and simple explanation

Very helpful. Appreciate it.

Nice job chica!!! Oh man, so much work to do the whole bottom again 🙈 but little Chuffed will be so thankful for this and hopefully no more pitting from now on 🤞🏼🤞🏼🤞🏼big hug do you 😘

Your knowledge is amazing.

I have been looking for heavy gauge aluminum boats here in Hawaii and now I suspect I know why there are very few of them. Proper building based on the material preservation when working with finite elements and their electrical properties. It would be a solid and minimal effort to maintain if done correctly. Very insightful info. Mahalo for your time and insight.

This video is fantastic thank you so much

Wow. Loved the info. Thanks!

I redid a little aluminum row boat, and have been around boats for 30 years. Excellent job there, you taught me more than I knew. The pictures were good too nice work. Now I know why the brass oarlocks ruined the gunwales.

Very interesting and informative video...take care and stay safe.

Great explanation! Glad to see you doing so well, medically, mechanically and electrically and other stuff too!

Great video! Many thanks for sharing.

your smile catched my heart so that I just ignored the content..

Thank you. Great vid. I finally understand ...

Parabéns linda doutora e mecânica muito guerreira gosto muito de você e este maraviloso comandante

very good explanation 👍

I enjoyed that a lot! You did a great job.

To be honest, my brain still cannot comprehend many concepts discussed here, but I thank you enormously for making it better... and btw, yay surfing fishing and sailing. May it all come to you soon. (Yay all the dogs in the world who need love and care)

Excellent video..

That was awesome, you explained that so well and easy for people to understand.

Thank you for these informations.For me it's the first video about aluminum boat.I need more.

Great explanation of corrosion and how it works.

Well done, that was a great explanation.

In many ways it is still somewhat of a Dark Art. No matter what you do, there will always be issues. People can be dogmatic about the right thing to do, but reality and theory don't always jibe. You have taken a thorough approach and done all the right things, great job Sheddy. You always do what's best for Chuffed.

Bonding is important too!

Excellent explanation thanks so much

well done , very good .

Thanks, nicely explained

Amazing! Thanks!!

Great channel, good variety, good people

VTSC, one aspect of the tank bottoms corrosion is water bottoms (condensate or fuel impurities) can become acidic or shift their neutral ph to the acid side due to DE-aeration when left under fuel in a bare aluminum tank. The aluminum will 'remove'/strip or attract the oxygen to the aluminum oxide and the ph shift happens. After the water bottoms become acidic enough they will start crevice cell corrosion sites as you show in the video. For this reason water bottoms sumps coupled with regular pump-outs are part of well designed, built & maintained marine tanks.

Your intelligence seems to be endless and its amazing to see - Amazing :)

Good explanation of galvanic corrosion

Brilliant...!

Thanks!

Having spent 30 years trying to eliminate electrolysis on my steel yacht I know it very difficult to avoid completely. Fortunately the damage was small enough to keep on top of. Some of the things I found to watch for were anodes with to high a lead content to work properly, stainless to mild steel contact, an alloy heat exchanger that has a direct contact to the sea via the raw water system.

Dr Sheddy and assistants heroically save another ailing patient - SV Chuffed!

pretty much the same with steel narrow boats on the canals good luck and keep up the good work

I stumbled upon this video while trying to figure out if I could use my boats aluminum hull as the grounding path for its electrical system. Thank you for answering it! If im interpreting this right, I should not do that.

As usual, Sheddy, the episode was tops !!! When you pulled the stainless rail away from the aluminum, I thought for sure you were going to mention how to place a non-metal disc in-between metal to metal contact to reduce galvanic corrosion. Totally agree (on any kind of boat) anodes are our friend. ✨💕✨✌️✨⛵️⚓️🏝👣👙✨

Thank you for your video and I will be watching to learn more things to know with the corrosion of aluminium lol me I just get cob webs lol

One of the most interesting tests , at least to nerdy me as I like electricity, was the one with a silver ingot, or at a minimum a well plated silver spoon, and a meter. Something like throwing the spoon into the salt water and measuring the voltage , with the black meter lead hooked to the boat, and the red meter lead on a wire connected to the silver. You get a voltage reading that indicates how well your "Zincs" are working. Apparently there is a sweet spot voltage which means you have the optimum amount of zincs for your vessel, its possible to have too much or too little. Its a topic which is hard to find details, especially for the more rare aluminum vessels, , kind of a scientific pursuit for a group of us . My cruisers help playlist has about 10 videos on galvanic corrosion topics. Yes, the systems you need when connected to shore power get a little complex and expensive. That said, there was a site called JetDock where they mentioned 1.3 volts as that special voltage and not going over that. Would need to ask them more about that. Also, with the Zinc sure to disappear, its essential that the hardware attaching them doesn't leak after the Zincs have disappeared.

Thank you so much for this extremely informative video, specially for the zinc phosphate tip! P.S. Love the pineapple shirt! ;-)

Awesome explanation lady 👍🏻

Lot,s of good information

You had me at "Al yooo min e yumm."

Thanks, we learn more before we chose the right boat.

Always use an isolation device when using marina power--as well as the other things you said.

First time seeing your channel. You know, you should do a restoration show for boats. Not just one, I'm talking hundreds before it's over, maybe 5 to10 a year, different boatyards, shipwrights, architects etc. Obviously would need multiple projects at once over the course of the year and an editor who can sort through thousands of hours of footage but, you know your stuff! I'd watch every season. Set up a crowd fund see how it goes. Oh and subed!

Just stumbled across you,looking for stuff on ally boats.Great explanation ,what type of boat do you have, looking forward to having a look through your videos, @lockeddowninmelbourne. Thank you

in a sailing boat, the simple fact of eletrostatic charges bild up in the mast or sails can generate enogth differential to promote galvanic or eletroctrolitic corosion ^^ but nice complete explenation BTW, nice video

Great science lesson! I agree the internet is wonderful ....but have to seek a reputable source. So glad that you look healthy & happy 🙂👌 All's well in New York. Our infection & hospitalization rates are very low. Schools are opening in a couple weeks. Some with modified classroom venues ...most will be hybrid or online. As good as it can be in a pandemic. Stay safe and well 😷✌️🇺🇸

Good knowldge

Great video. I sort of knew the science but not how it applied to aluminium boats. How long does it take for this type and scale of corrosion to occur? Is there any rule of thumb? Thanks

Thanks for the video. Interesting and very useful. Do you leave unpainted/untreated the contact points between the anodes and the hull (metal to metal contact)? Good luck in your adventures.

So random I came across your channel. Im polishing an aluminium V8 chev inlet manifold and searching for tips and tricks. Im wondering now after seeing your video, if I attach an anode would it help inhibit corrosion in an engine? Given its an engine its does use high tension and low voltage, plus has water running through it for cooling. Surely that has to attribute to corrosion in the block and head. Im guessing if an anode could help an engine, someone would of already done it. Man great project and you really have a presence about you on camera. Im in Radelaide... So Go Oz content.

This video is good ad for Fiberglass boats.

Hi All! this is the first time that I watching your video and I found it great! I've been sailing year with Ovni (aluminium French boats) and I've never had corrosion (thanks to the anodes). Just a question: what does Vet'S tail mean? are you a Vet too?

Once again so sorry you had to go through all that. Dated a lady with a 64 mustang 1st year. Boy did she use the charm on me 6 months later it was a good car.

the through hull fittings you showed as an example are not copper, they are bronze/ Brass, mix

Great, hope it floats .

What about a soft wire brush on the end of drills to clean off the corrosion in the pitting in the boat ????

What about paint it down with old engine oil to see if the oil might put any strengthener back into the aluminium

That was very interesting ! Thank you! Is that boat an Alubat?

i would have used interprotect 2000e and use aluminum anodes not zinc. i would also get an electroguard 630afm kit for $1500 for iccm.

When you do your research... go chuffed!

This is good, but like you said there's a lot of bad info and I think a lot of that comes from the telephone effect. The further in the chain of correspondence the listener is from someone who actually studies chemistry, the more chance the info is dumbed down at best and wrong at worst.

Well explained , aircraft suffer the same but not at the same rate as boats in salt water

I was just out on a friends brand new dufour 390 when i said she should check her anodes when ever she gets a chance (since she charters her boat) I dived on the boat and saw her saildrive anode had a missing screw and was hanging off the saildrive, she didnt even know there was an anode there. Could have been an expensive mistake. I got the impression you didnt know any of this before you saw all of this damage and have learned a great deal since then. The last 2 bits of advice, dont drop any screws or metal in your boat, be hyper vigilant about it, if you drop a sss screw into the bilge you will end up with a hole in your boat, next any time you need to screw a sss screw into your alum, use duralac on the screw - it will isolate the 2 metals. gl hf.

MJ Sailing didn't paint their hull I believe. How does that work ? Glad Chuffed has her anodes now. No lady should be sailing without them 🤣

great explanation, thanks! The thing I've never understood is how to properly ground your electrical system in a metal boat. Be nice if you could cover that (or do you need to bring in your dad for a guest lecture?).