Originally posted by everyidea
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However, my electrolysis copper negative outside part is black, even if it is being insulated with transparent tape:
Not sure how long it takes to get black color. Maybe because I left it in the water after electrolize them.
Edit: I just tried it with copper wire and stainless steel bolt.
I first apply the positive of my charger to copper wire, negative to SS bolt. After 15 seconds, I apply the negative to copper wire. After some second it start to turn black. After 30 seconds I take it out and dry it in front of fan.
However the result is some white deposit over the black part. Maybe because I use alum as electrolyte, don't know.
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