I live in an area of Canada where they use a lot of salt on the road to remove snow. A device was introduced first by Toyota, then Canadian Tire that changes the electrical charge in the metal. As I understand there are a large number of electrons held in weak bonds that give steel a positive charge which interacts with the negative charge in salt to speed up rusting. The anti rust device creates a neutral charge in the metal thus reducing, or eliminate rust. I am not sure that my explenation is correct, but I had this device in my last car, a Toyota Camry which had no visible rust on it when I traded it in for another car when the transmission went. My question is if this system might also work for OWB? Wouldn't it be great if a $250. piece of equipment would reduce corrosion and rust in the boilers of our outside stoves extending the lifetime of these stoves. Does anyone know the chemistry behind these devices, and do you think they would work for OWB? I know that they are used by ships, which is where the idea cam from apparently. J