Stainless fasteners failure

[AngusMcDoon]

On another thread, did you say that the hinges are galvaniised?
Galvanised to stainless can cause cracking in the stainless when seawater is added.

No. They are stainless as well. I believe that some other trimarans have non-stainless hinges, but not mine.

[AngusMcDoon]

You've been lucky enough to have a warning, I would heed it if I were you. You definitely need to replace all of them.

I have just wandered down to the mechanical engineers' lair where I work, and when they had all stopped cringeing, sharp intakes of breath, going yikes, ouch and jeepers, they all agreed that it's time to replace the lot, and do it regularly.

I shall buy a box of 100 once I've confirmed that the 1 I have ordered fits.