I was talking for anchoring
and upwards but definatly not permenant immersion. Personally I'd use a SS before most 'tested' shackles, them little bu**ers being very high tensile.
Did you note how many 'mission critical' fittings, fixtures and keel
made of titanium let go during the last few Round the World
races? So many they swapped most out for SS while in Aussie. Calculated to have stupid amounts of safety
margin and still went snap. 3" rams going pop. That is spooky.
There is masses of SS connections on galv gear
and we've yet to see anything spooky happening between the differing metals. Not saying this isn't any but I suspect not enough to be an issue.
Only realy seen one very spooky bit of SS anchor gear but when we sussed further (it was our gear supplied) we found it lived on bare carbon fibre in the anchor locker
. 10mm to 3-4mm in 6 months. Chain replaced and locker lined. Last I spoke to them it was 4 years later and all was fine.
We make the floaty ring things found in marinas
out of 316. Many have been living for many many years now without many worries. The only real worry is when you have a leaking boat, volts that is. The current
will travel down the mooring
lines and out through the legs of the floater. This has cause a small amout of wastage on some but still not that much considering the years taken.
Idealy you want to keep anchor metals the same but a smidgen of SS in a galv one does not seem to cause any problems. We have done a pile of all SS rodes and apart from the above one, without any problems. Actually the amount of SS being requested for anchoring gear is sky rocketing. People just love the bling on the pointy end.
I think when it comes down to it most people either swap out for new or do a Maui by hooking land and losing their gear long before the SS gets to be a if any issue.