Could you share the circuit and document when you find them? I am interested to know more.
Frankly I doubt as corrosion happens over time, those that consume electricity cannot be a practical solution, using the differences of electronics-charge for protection is more feasible.
You could get galvanised-zince spray to spray a layer for dispense, on top of that you can spray a layer of normal paint. This would give a reasonable good amount of protection that most likely to outlast the structure or equipment themselves.