Yep... Sacrificial zincs, salt water, electricity etc...
I doubt that salt water is circulating in the loop between the turbine and steam generator. That’s an interesting idea. I wonder about the integrity of the tubes in the condenser. From the images, the plant doesn’t have cooling towers so sea water is probably used to condense the steam exhausted from the turbine.
Instrumentation should have spotted the change in water chemistry from salt.