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RE: Aluminum Exposed To Seawater

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As you probably already know, the 6061-T6 is what is specified for structural aluminum by USACE for Stoplogs. 

It is commonly used in the manufacture of heavy-duty structures requiring good corrosion resistance and is used in marine components.
I don't know the exact mils per year for corrosion in seawater projects, but it is recommended for marine application. 

Harold Sprague

To: seaint(--nospam--at)
Subject: Aluminum Exposed To Seawater
Date: Fri, 23 May 2008 16:01:03 -0400
From: canitzcf(--nospam--at)

I'm desiging a small gate (i.e., 5'x5') that will be exposed to seawater.

Is 6061-T6 a valid temper/alloy for a structure that will be subjected to this corrosive condition during it's design life? Is there another temper/alloy that's more appropriate?

Charlie Canitz, PE
Annapolis, MD

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