I've built myself a electrolysis tank, using a plastic barrel as the container, rebar as the sacrificial cathode, a 12v 15A car charger (DC), and a Sodium Carbonate solutions as the eletrolyte. The anode is a rusty piece of metal that I need cleaned.
This works wonders, but I noticed that when I charge a 12v battery with the charger, the analog voltmeter jumps to around 12v as soon as I connect the terminals, but it doesn't when I connect it to the electrolysis tank?
I've seen it jump once, in the electrolysis tank - All the other times it's been near zero (Maybe slightly over?)
How come this happens? Shouldn't I measure 12v since that is what I output, or am I missing something? I am thinking that could be a huge voltage drop in the electrolytic solution, and that I'm actually only seeing a few volts, could be hard to read and display on the analog voltmeter (However, I'm not sure this is how it works...)
The charger/powersupply's negative wire is connected to the anode and the charger/powersupply's positive wire is connected to the cathode. The voltmeter is build into the charger/powersupply.