Corrosion on frame

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tcsm
Posts: 26
Joined: Mon Dec 12, 2016 11:50 am

Corrosion on frame

#1 Post by tcsm » Tue Feb 07, 2017 5:01 am

After removing original plywood on my 1992 there is some corrosion on aluminum support brackets as pictured.
Anyone found this during there rebuilds Any recommendations as to treatment or prevention before it gets ant worse?
Thanks!
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JLester273
Posts: 241
Joined: Wed May 10, 2017 10:23 am
Location: Cincinnati Ohio

Re: Corrosion on frame

#2 Post by JLester273 » Mon May 22, 2017 5:47 am

Did it by chance have the green pressure treated touching it?

I know something in the green stuff will corrode aluminium. Not sure about the new stuff they are selling now. Marine stuff I think is ok.
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http://www.pontoonforums.com/viewtopic.php?f=16&t=24807

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curtiscapk
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Location: OP KS\Hillsdale Lake

Re: Corrosion on frame

#3 Post by curtiscapk » Mon May 22, 2017 6:12 am

Yikes! I think I would add some extra metal to support that. Haven't seen that on metal that doesn't touch water full time.
Craig and Paula
"THE FLOATER" rebuild Spring 2013
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tsmodie
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Re: Corrosion on frame

#4 Post by tsmodie » Mon May 22, 2017 6:44 am

This is usually caused y using regular pressure treated plywood on the deck, I have seen it alot there is too much copper in regular pressure treated wood, and causes the pitting you are seeing when in contact with aluminum, A good CCA treated plywood is required when in contact with aluminum, especially if it was in salt water. Do you know the history of this boat? Was it ever in salt water?
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MH Hawker
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Re: Corrosion on frame

#5 Post by MH Hawker » Wed May 31, 2017 8:26 am

that is the result of PT wood some one has use it in the past
If it aint broke your not having enough fun

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