Well, it will go a pretty green colour in quick time, it has all the strength of cooked spagetti and it will love being bolted to your Ali strips on the edge of the deck
Whilst Stainless Steel
is a shocking price
and not easy to work, I did have a large A frame made up for a previous Rib
which held a 6 man liferaft
. Made in 2" Ali tube it could be esaily lifted up on board by one person when the boat was on a trailer. The firm used an ali tube suitable for marine
use so limiting the corrosion
potential and it just went a dull grey colour over time, no furry white stuff that sometimes appears on aliminium.
The only place for copper is in the antifouling paint
and the bottom of pans.