Transom is corroded

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Prowelder
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Transom is corroded

Post by Prowelder » 18 Dec 2017, 12:07

Here is one I did very similar to yours ImageImageImageImageImage

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Hanr3
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Transom is corroded

Post by Hanr3 » 19 Dec 2017, 00:47

Couple of comments.
I have used POR15 on a gas tank. We bought a used S10 Blazer for my son and the gas tank had rust holes about half way up the tank. We dropped the tank, cleaned it up best we could, then followed the directions on the POR15 stuff. Worked like a charm and took care of the rust issues. Son drove that truck for another 4 years until we sold it. Never had an issue with the gas tank, or stuff in the fuel.

Wood, IF you are replacing the wood I highly recommend White Oak. It will cost more, however it will last your lifetime, even submerged. Plus it is extremely strong and you wont have any issues with motor weight or transom integrity.
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imjohnnykelley
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Transom is corroded

Post by imjohnnykelley » 19 Dec 2017, 01:27

Today I got the interior wood off the transom, so now I only have the aluminum left on the back. Well I have what is left of the aluminum. There are probably 30+ holes of different sizes and a giant hole about 1.5 ft. And I haven't even started sanding it down. I am not sure that it is salvageable with the POR-15 and glass. Do you think it will handle a gap like that? Or am I fighting a losing battle and need to come to grips that it is time to weld in a new rear end? I'll post a pic tomorrow to show you what it looks like right now.

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DaleH
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Transom is corroded

Post by DaleH » 19 Dec 2017, 10:02

imjohnnykelley wrote:
Johnny wrote:Have you ever used POR-15 rust encapsulator ?
Never used it. Will it work at stopping corrosion on aluminum?
Here's the deal ... IF that aluminum corroded because the wood was wet with saltwater and IF you see a white layer of chloride (salt precipitate) in the alloy of the transom, then your transom has the condition known as precipitate chloride corrosion and the ONLY cure is a complete removal. It is like a cancer! Once in there, it actually feeds on itself as it moves through the tin.

This is what I warned you against.

Clean up an area well and get a magnifying glass and a good light. If you find a 'pin hole' ... how 'big' do you need to drill out that pin hole before all traces of a chloride layer are removed? When I checked my transom, I started with some < 1/8" holes that ended up being 3/8" in diameter and yet under review by a good magnifying glass, I could see a white corrosion layer inside or in the middle of the tin panel. If you have that, IMHO it requires total removal of the affected structure.
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eshaw
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Transom is corroded

Post by eshaw » 19 Dec 2017, 12:43

That piece of aluminum is unfit for attaching anything to, it just won't provide a good base for any repair. I think the only solution would be to remove and replace it. Not trying to be critical of your boat but is this the only place you've noticed problems?

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Johnny
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Transom is corroded

Post by Johnny » 19 Dec 2017, 13:52

JohnnyKelly said: There are probably 30+ holes of different sizes and a giant hole about 1.5 ft.
And I haven't even started sanding it down.
whoooaaaaaa NELLY !! is that a typo ???? do you actually mean inches and not feet ??
an 18" hole is another issue all together !!!
Like Dale suggests - find out where the corrosion starts and stops.
then - cut out the whole transom panel and hone up on your metalsmithing skills.

no matter how you toast it - it is still going to be a lot of work.
providing you don't discover other "issues" once you start cleaning the rest of the hull.



.
http://www.tinboats.net/how-to-build-a-transom/
http://www.tinboats.net/varnish-vs-polyurethane/
All about Primers = http://www.tinboats.net/primer-and-paint-basics/
Paint, Thinners and Applications = http://www.paintingforpainters.com/

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imjohnnykelley
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Transom is corroded

Post by imjohnnykelley » 19 Dec 2017, 15:53

Johnny wrote:
JohnnyKelly said: There are probably 30+ holes of different sizes and a giant hole about 1.5 ft.
And I haven't even started sanding it down.
whoooaaaaaa NELLY !! is that a typo ???? do you actually mean inches and not feet ??
an 18" hole is another issue all together !!!
Like Dale suggests - find out where the corrosion starts and stops.
then - cut out the whole transom panel and hone up on your metalsmithing skills.

no matter how you toast it - it is still going to be a lot of work.
providing you don't discover other "issues" once you start cleaning the rest of the hull.

.
Nope....didn't mean inches. Haha. It was a lot worse than I expected to begin with. Luckily as I have been cleaning it and the rest of the hull it looks like the corrosion is just on the transom panel. The only problems with the rest of the boat are dents and ugly. Haha. Gonna have to replace the transom.

So should I be welding it on like the old one is, or rivet it on? Welding is what was original. Would brazing it on be a possibility? I am new to the tin boat world. Just trying to learn and you certainly have a lot of knowledge in it. Thanks.

Here is a pic of what I am dealing with.
Attachments
IMG_5948.JPG

imjohnnykelley
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Transom is corroded

Post by imjohnnykelley » 26 Dec 2017, 18:40

Johnny....thanks so much for stopping by today. It was great to get my options from someone that has been there and done that. I appreciate it so much!

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Johnny
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Transom is corroded

Post by Johnny » 26 Dec 2017, 19:53

my pleasure - no problem at all.
we went to the South Pier and brought home a half dozen mangrove snapper.
threw back about 10 gallons of bait stealers !!!

BTW: this is why I was a little lightheaded and fuzzy visioned while looking at all that CORROSION !!
https://www.forum.tinboats.net/viewtopi ... =2&t=43894





.
http://www.tinboats.net/how-to-build-a-transom/
http://www.tinboats.net/varnish-vs-polyurethane/
All about Primers = http://www.tinboats.net/primer-and-paint-basics/
Paint, Thinners and Applications = http://www.paintingforpainters.com/

1959 Crestliner Commodore 14'
1959 Lone Star Malibu 14'
1958 Johnson 35 RDE-19 Sea Horse
1958 Johnson 35 RDS-20 Super Sea Horse

imjohnnykelley
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Transom is corroded

Post by imjohnnykelley » 26 Dec 2017, 21:50

Johnny wrote:my pleasure - no problem at all.
we went to the South Pier and brought home a half dozen mangrove snapper.
threw back about 10 gallons of bait stealers !!!

BTW: this is why I was a little lightheaded and fuzzy visioned while looking at all that CORROSION !!
https://www.forum.tinboats.net/viewtopi ... =2&t=43894
.

Holy Cow Johnny. That is incredible. So that was just a few months ago. I am blown away. Honestly I wouldn't have noticed anything had you not talked about it. Good on you for healing quickly. And those Mangroves will be tasty too!

imjohnnykelley
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Joined: 16 Dec 2017, 14:34

Transom is corroded

Post by imjohnnykelley » 05 Jan 2018, 12:15

So I met up with my buddy who has C & C water jet business. He is gonna digitally cut my new aluminum transom and also build out my new 1.5 inch transom out of aluminum tubing. Should be awesome. Getting it all for about the same cost as wood would have cost me. Awesome!

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