And here was me still trying to figure out what aluminin was
Aluminium hulls can get
electrolysis and they don't like dissimilar metals.
I have seen vessels that actually have bubbles boiling off of them like a dissolving aspirin in Mackay Harbour.
But then fibreglass boats can get
osmosis,
steel boats can rust and timber boats can
rot.
Proper preparation,
installation and
maintenance is the key.