BeamReach said..
What are aluminium hulls like for maintenance, other than the usual 18 month anti fouling?
Are they like a an old steel hull, a sleeping corrosion issue.?
I would think they are a noisy hull, with waves lapping under sail and at anchor?
Cheers....
What yacht manufacturer and naval architect designed model are you talking about?
Like any hull built out of any material there are pros and cons. Expect you would have searched and found many such articles as these;
yachting-pages.com/articles/aluminium-boat-hulls-vs-steel-boat-hulls.htmlwww.godownsize.com/common-problems-aluminum-boats/Aluminium hulls are not a sleeping corrosion issue but don't drop an item with a high % of copper into the bilge......
These French builders specialise in aluminium yachts and this article has notes on electrolysis which you would have seen.
www.yachtingworld.com/boat-test/allures-40-9-vs-ovni-400-french-aluminium-centreboarders-128257As regards noisy hull - there are easy fixes as you would have seen
www.cruisersforum.com/forums/f47/owners-opinions-on-aluminium-boats-141132.htmlAluminium has about 1/3 the elastic modulus as steel so panel deflections of an equivalent scantling design aluminium and steel panel are 3x greater for the aluminium case.
Obviously a suitable marine grade aluminium alloy needs to be used - Pechiney produced many marine use documents for aluminium till they were taken over by idiots in 2003
www.solarnavigator.net/aluminum_alloys.htm