If you are worried about corrosion
between the blocks and other hardware
, put an insulator like electrical
tape under the part where it touches the mast
. SS doesn't have much of a problem with corrosion, bronze definitely needs to be insulated from the mast. SS hardware
has been on my mast for over 40 years without an insulator and corrosion under the pieces is/was very very minor.
Ted-Gel, LocTite, Lanolin, etc on the threads of the fasteners will limit corrosion there.