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Cleaning Salt Oxidation off of an Aluminum Hull

post #1 of 10
8/20/06 at 11:05am
Thread Starter 
Any ideas on how to Clean Salt Oxidation off of an aluminum hull?
Any Techniques or Products that you can share?
Thanks in advance,
Woody
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post #2 of 10
8/20/06 at 9:07pm
i use my presure washer works good
just have to stay after it
ox is the equivelent of rust
wash or paint its up to you
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post #3 of 10
8/20/06 at 9:37pm
Quote:
Originally Posted by Woodie
Any ideas on how to Clean Salt Oxidation off of an aluminum hull?

Any Techniques or Products that you can share?

Thanks in advance,

Woody



Super Renews II is the stuff to use. Looks like they are just calling it sharkhide cleaner now. It will make a 30 year old boat look brand new. I've been in the aluminum boat biz for 15 years. Its the only stuff that works.
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post #4 of 10
8/21/06 at 7:51am
Thread Starter 
THANKS SO MUCH FOR THE LINK
Woodie
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post #5 of 10
8/21/06 at 8:42am
Quote:
Originally Posted by sea ranger
ox is the equivelent of rust


I am not sure I agree with that. From what I understand is that Ox is good for an Aluminum hull because it provides a layer of protection. Do a search on this subject.

From ship shape maintenance article:
Aluminum: Aluminum is a great material for use for hull construction. It won't rot, it's very resistant to cracking and it forms its own protective coat of oxidation.
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post #6 of 10
8/21/06 at 9:15am
Is it #1 or #2

The white stuff on your boat is aluminum that has changed into aluminum oxide. Aluminum oxide is "rusted" aluminum.

Or is it cosmetic. Aluminum oxidation produces a protective coating that prevents the base metal from corroding.

From your post I read it as a cosmetic #2 issue.
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post #7 of 10
8/21/06 at 11:38am
Quote:
Originally Posted by yak too
I am not sure I agree with that. From what I understand is that Ox is good for an Aluminum hull because it provides a layer of protection. Do a search on this subject.

From ship shape maintenance article:
Aluminum: Aluminum is a great material for use for hull construction. It won't rot, it's very resistant to cracking and it forms its own protective coat of oxidation.


Click on the link that I sent wood. You'll see what the cleaner and the sharkide does. One clean the aluminum by actually removing a microscopic layer of the aluminum down to new. The sharkhide seals the aluminum the same way that paint does without actuallt having to paint it. Sharkhide is invisible. Its wiped on with a 100% cotton cloth. I usually did three coats. Seemed to last me about 5 years (I trailer not moor) When you can start to see the overlap lines from the sharkhide remove by using the cleaner mixed 50-1. Then simply reapply the sharkhide and go another 5 years. The boat will look brand new 10 years from now.

Believe me I have tried everything...
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post #8 of 10
8/21/06 at 11:43am
Quote:
Originally Posted by yak too
I am not sure I agree with that. From what I understand is that Ox is good for an Aluminum hull because it provides a layer of protection. Do a search on this subject.

From ship shape maintenance article:
Aluminum: Aluminum is a great material for use for hull construction. It won't rot, it's very resistant to cracking and it forms its own protective coat of oxidation.


Here you go:

Rationale for passivating aluminum

Aluminum naturally forms an oxide almost immediately that protects it from further oxidation in many environments. Unfortunately, this naturally-occurring oxide provides no protection during exposure to any saltwater spray environments, such as occurs in areas near bodies of saltwater. In such coastal environments, unprotected aluminum will turn white, corrode, and largely vanish over periods of exposure as short as a few years. The only way to prevent this from occurring is to use a more robust conversion coating on aluminum surfaces that will not be affected by the saltwater atmosphere. Alodine, Iridite, and chem film coatings can provide varying amounts of protection for aluminum surfaces.
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post #9 of 10
4/4/10 at 4:45am
Quote:
Originally Posted by Woodie View Post
THANKS SO MUCH FOR THE LINK
Woodie

i tried the link but does not work. i already registered, so that should not be the problem-i guess... any idea how to rach the sharkhide?
thanks
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post #10 of 10
4/4/10 at 9:01am
The old plain old fashioned aluminum turns to white powder or crystal types material really fast in salt water and becomes useless quick.

Since (70's?) they started making the "Tinnies" out of marine aluminum. Some sort of alloy that really seems to hold up very well.

The closest mine get to a wash down after use is maybe a little spray from a mud puddle .... maybe. Plus a very rare treat to a fresh water pond once or twice a year.

I've never seen cause to do more than that since the marine aluminum came on the scene.
But, they live on trailers too. May make a differeance?
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