Goes4ever wrote:great setup Dan can you explain more about yours? What is your power source, why so many clips?
The power source is a car battery charger. I usually like to keep 40 amps of electricity pumping through the solution in the tank. The solution is water and Ph+. As the solution heats up, it will pull more amps. So even if the charger is set on 40 amps, the amp meter on the charger will eventually begin to increase. When that happens, I just put the charger on 25 amps and it'll stay around 40 or 50 amps.
The clips on the stainless angle bar across the top are to keep the bar from moving or from falling off the tank if it is accidently bumped. You don't absolutely need them. But I like to use them to keep that bar still even if it is bumped. (The reason for that is explained in the next paragraph.) I hang the cast iron piece to be cleaned from the bar. The piece must be completely submerged in the solution. Then I hook the negative charger cable to the stainless bar and the positive charger cable to the stainless steel lining inside the drum. Lately I've been clamping a vice grip wrench onto the top of the lining sticking out of the solution. Then I attached the positive clamp to that. The reason for that is because the white bubbles rise and get on the battery charger clamp and muck it up. (The other reason for the vice grips is also explained below.) There is an element of danger when using electrolysis to clean items.
It only takes a few hours to clean up most pieces, however you can leave stuff cooking for as long as 24 hours. Here's a
word of caution. Those pretty white bubbles are full of hydrogen gas...the same gas that was inside the Hindenburg blimp when it exploded.
The bubbles, which are very difficult to ignite, are highly flammable. A guy on the cast iron forum where I used to post said he had his electro tank fired up in his basement. He heard a very loud blast that sounded like someone fired a shotgun inside the house. An electric spark from one of the battery cable clamps ignited the bubbles. Thankfully his house didn't burn to the ground, but he got the fright of his life. I use those clips you asked about to help keep everything nice and still so no sparks are created. That's also why the ends of the metal clips are rubber - spark reduction.
The negative battery cable is clamped on the bar right next to the clip to help ensure the battery clamp doesn't move and create a spark. That's also why I now attach the positive battery cable clamp to vice grips instead of directly on the steel lining in the drum. It raises the clamp up away from the bubbles. You've got to be very careful. If you don't blow up your house or your self, you end up with a really nice piece of iron.
I have a few other tricks for restoring cast iron, but that's in addition to electro which is the primary interest here. I really like Mike's setup for cleaning coins. I'm amazed at the before and after pics in his video. Awesome!