[timbn2]

I'm using a 25 amp rectifier similar to the one sold by Caswell. I have 6 pieces of rebar around a 5 gal bucket all wired together with copper wire. i have the red lead on that an the black lead on the part... or more precisely to copper wire wrapped around the part. I used 1/2-1/3 cup arm and hammer WASHING soda in water as the electrolyte fluid.
i tried 2 different small parts (brake master cylinder) and a 1/2" rod ranging form 15 min to 2 hours on 8-12 volts. the most amps i ever got at the highest volt setting was 5. Does that sound right, or should i be getting more amperage at 12 volts?
also regardless of the time, there didn't seem to be a whole lot of rust removed on either part. the water defiantly had rest in it and so did the re-bar and the part was "bubbling" like its supposed to.
The master cyl. only had very small amount of rust on it and it still had some on it after about 1 hr?

Did i do anything wrong? Do i just need to leave my parts for more time? I am also told that as soon as the part is de-rusted the reaction will stop despite current flow. is this true?

thanks a lot!