G'day Widget, I've thought about using an old 44 as well because it would give an even current flow to cover the job being cleaned but remember how the sacrificial anode dissolves? You'll come out to find half your drum gone and your treasures on the ground.
When using electrolysis it apparently releases the hydrogen from the water which causes hydrogen embrittlement in the metal. This is a mayor problem in things that take load like gears and shafts. Apparently there are two ways to dissipate this hydrogen. The first is to leave it alone and it will come out over time and the other is to bake it in the oven. Please note I say apparently a lot as I've only done this a couple of times and my knowledge comes mostly from doctor google.
I have never tried the vinegar trick but have read of it a few times. Does that elcheapo vinegar do the trick?
From my understanding molasses is sensational and can be used mixed down with water but has three shortfalls. One is it takes longer. Two is the cost of molasses, even from a stock feeder and thirdly while molasses does dissolve rust first it will also dissolve good metal whereas electrolysis will only dissolve rust and then stop no matter how long your piece is left in the bath.
