Impress current cathodic protection is another way of dealing with this.only thing I know about this subject is this:
Out here on houses or buildings very close to the Pacific, the "salt air" or sea spray, will get down into concrete and cause the rebar inside to rust. The rust expands and causes the concrete to break apart. I have to repair these sorts of things occasionally.
What you sometimes see used on oceanfront houses are rebars coated with epoxy. How effective the epoxy rods are I don't know
Epoxy coated is not the perfect material. Needs extra care in placement. Chip the coating and it needs to be touched up. (Rarely done)
If you ask me galvanized rebar is the way to go.