They will work, BUT if left in the solution they tend to dissolve, I think they may be graphite with a clay binder? I use slices from block graphite, which can be expensive if you don't rescue the blocks from a skip....
The slices I use are about 12mm / 1/2" thick, 75mm/3" wide, with a foot or so immersed I can get up to 25A and trip the breaker on my battery charger
It helps if the graphite surface area in solution is about the same as (or bigger than) the area of the steel being de-rusted in the EGBERT (Electrolytic Gungey Bubbling Encrustation Removal Tank), I think?
Dave H, (the other one)
Jon (May 25, 2019), Toolmaker51 (May 26, 2019)
I have used this process to clean up lots of parts in a tractor restoration, including the engine block.
I would never waste time bolting the anode to the container, because , from my experience, they need cleaned at least every day.
I used a 55 gallon plastic drum for the engine block and scrap pieces of tin for the anodes, placing several large pieces all around the part to be cleaned.
Very simple to just hang them from the edge of the bucket or barrel and clip leads to connect them.
You definitely want to do this in a well ventilated area, because the water breaks down, releasing Hydrogen and Oxygen into the surround air. Quite the explosive mixture, if contained and subjected to a small spark!
Scotsman Hosie (Jun 13, 2019), Toolmaker51 (Jun 12, 2019)
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