It is often mentioned that stainless screws in alloy cases is no good. Still there is a lot of them for sale. I happened to see that Loctite 8009 should be a solution to the problem. Anyone with experience of that stuff, or any other gunk to use?
You do not need an imposed electric current to cause corrosion. Any electrolyte e.g. Water with some salt between two dissisimilar metals will generate its own current and cause corrosion.Usually electrolytic corrosion requires an electrical current to be passing through to cause corrosion , hence the problem with the rear mudguard hinge pivots which is the electrical return path for the rear / brake light.
Even static electricity conduction can be a problem on boats, oil rigs etc along with the constant presence of salt water. Probably not a big problem for most Vincents today.