Just looked through the pictures on my phone as I was eating lunch. They show differences in the test pieces that we couldn't spot with our unaided eyes.
These are the spikes as they started out. I filed down a spot on the end to clamp the negative wire to and so we could label them.
And this is our three tanks set up with the anodes adjusted to provide a range of currents. THANK YOU so much JPG40504 for the diagram you made. That opened my eyes more than anything else and provided the basis of our setup.
What you can't quite see behind tank "B" is the connection block I made for connecting our positive wires to. This allowed us to easily disconnect one of them so we could check and adjust the current as seen here.
These are the spikes after 3 hours. It's amazing that the camera sometimes sees things in a different way. In the first picture above, they looked a lot more rusted to our eyes than they did to the camera. And we couldn't see those red/orange spots of rust on the "A" spike at the time of the picture below, but the camera could!
These are the spikes after 7 hours.
