(Joe) wrote in message . com...
Peter Wiley wrote in message ...
In article , Capt. NealĘ
wrote:
Aluminum is relatively worthless for a boat hull.
All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it. It will begin to turn to dust within
hours, break apart and sink.
A stainless steel boat is impervious to just about
anything but strong acids.
Bwahahahahahahaha. It's obvious you know SQRT(f**k-all) about
metallurgy. S/steel is not a good metal to have in continuous contact
with seawater.
My biggest objection to aluminium is that its abrasion resistance is
low compared with steel and its ultimate failure point is too close to
its deformation point. Steel is a lot more ductile but does require
good barrier coats to keep rust at bay.
If money is no object, you build out of cupro-nickel.
PDW
Whats cupro-nickel? And why?
I hear nickle copper is best, the copper is a perfect antifoulant.
http://www.technicalmaterials.com/me...ro_nickel.html
Same stuff, just you got the name wrong. Look it up in Lincoln's
welding handbook and you'll find that you can weld it with MMA using
ECuNi rods, good weldability. Ditto for GMA welding, GTA welding and
fair welds using carbon arc tho why you'd bother is beyond me. Preheat
not required, no fancy techniques needed unlike aluminium or s/steel.
Good mech properties. Pretty much inert so no real corrosion probs and
as you noted, naturally antifouling.
Real problem is the price. Friend of mine's brother is a scrap metal
dealer, got 2 tanks of Inconel one time for the price of s/steel. Wish
I'd have known him back then, I woulda bought them off of him and
saved the sheets for a hull.
PDW