This all sounds pretty high tech just to remove rust. Why can't you just throw 'em in the blasting cabinet?
This all sounds pretty high tech just to remove rust. Why can't you just throw 'em in the blasting cabinet?
I would think that you might be able to find some plastic cap plugs or similar items to seal off the bushings. Perhaps some Permatex (black) or other mastic as an added seal on the brass end faces to insulate them from chemical activity. Perhaps rubber stoppers or corks with sealant would work as well.Electrolytic derusting does not reverse the process. It does remove the rust without removing any of the uncorroded metal.
Evidently you must have assumed I was talking about blasting with some real abrasive stuff. There are many blasting mediums that do not remove good metal. I don't know how much pressure it would take to warp cast gears, but I'm sure I couldn't do if I tryed.
As far as precision surfaces, if these gears are already rusty, they are less than precision to start with. Besides the corrosion and pitting, a less than glass smooth finish is actually a benefit to retaining lubrication.