Quote Originally Posted by Philadelph View Post
I don't really see the point of doing this if you are going to restore the blade at all. Is it just for removing rust on a blade that you weren't planning on sanding? Looks like this method removes metal anyway, so wouldn't you have to restore it afterwards? Honestly, when you sand a blade to begin restoring it, it takes any rust away immediately. I'm not putting this method down, it just seems like a lot goes into this to take rust away.
If you look at the chemistry involved, you'll see that metal is actually being re-formed rather than taken away. When steel rusts, the iron in it reacts with oxygen to form iron oxide. When it reacts, iron loses an electron. With electrolysis, you're using electrical power to 'push' those electrons back into the iron. The solutions are just there to provide positive and negative ions, all of the work is being done by the electrical current. That's why the other piece of metal rusts, you're 'stealing' it's electrons to give them back to the razor. So if you have a really badly corroded blade or rust in an area you can't reach with sandpaper (say down inside of really fine grooves), you can actually save some of that corroded metal by converting it back to steel.