posted on Nov, 22 2016 @ 05:29 AM
Aluminum seems like a good material, it normally doesn't rust, so it must be worth using right? Until you expose it to seawater corrosion. In my
limited experience the stuff turns brittle and flakey, unless you go way out of your way to thoroughly cover it with paint and other corrosion
preventative measures. Other metals usually get surface corrosion, and etch through. Still takes a long time, if it's anything solid like iron-nickel
steel alloys. Aluminum tends to do this thing where it looks fine, until a crack or something occurs. Then it puffs up and gets bubbly. Then what
you're left with is chalky flakes where you can poke your finger through it. Having as a hull material based on aluminum below the waterline probably
wasn't the best idea. If the goal is trying to make it lighter for whatever reason, composites may have been a better choice - even if more difficult
to fabricate with on that scale.
I wonder what they'll do to overhaul these things to get them up to spec?
edit on 22-11-2016 by pauljs75 because: (no reason given)