Posted by ScottyHOMEy on November 28, 2008 at 08:07:44 from (70.105.234.190):
In Reply to: Rust Remover posted by John B. on November 27, 2008 at 19:54:46:
For chemicals to clean the odd small parts and for larger parts too big for an electolysis set-up, I like a dilute phosphoric acid solution. You can find it made up, usually in quart bottles in the paint section at HD or Lowe's, under brand names like Jasco or Ospho. You can dip the parts or brush the stuff on. For light surface rust, you can rinse them clean before the acid solution dries, and dry them by hand after. For heavier rust, let it dry right on the piece, then use a scotch-brite pad to scuff off the glaze and powder that will form up.
Electrolysis is great. Yes, it will make hydrogen, so I wouldn't recommend open flames or the like in any case. That said, keeping the top of your tank open and doing it in a well-ventilated area, something like a garage with the doors open will keep you out of trouble. What you want is to let the small quantities of hydrogen dissipate in a harmless concentration. When things (like batteries) explode it's because the hydrogen ignited when it was concentrated and confined, as in a battery case. Treat your electrolysis tank like a charging battery and you'll have no problem. That means things like making sure your charger is unplugged while making or removing the connections to the pieces in the tank so as not to have any sparks near the surface, powering the charger from an outlet several feet away and preferably below the level of the top of your tank (use the full length of the wires on your charger, and plug it into an extension cord laying on the floor -- if there is any hydrogen around, the last place it will be is on the floor), and no smoking or any other flame or spark near the tank. It's an amazing process, and will often loosen any painted patches as well, giving you a good even surface to finish prepping for paint.
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