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Old 2015-02-23, 3:25pm
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Speedslug Speedslug is offline
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Join Date: Mar 21, 2009
Location: Winnebago, MN
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I would think that copper powder would get oxidized quickly and might inhibit the coating process. Graphite (pretty much pure carbon) doesn't oxidize much unless you burn it with a very hot flame so you are probably better off going with that.

If the copper build up is not granular it is most likely due to the acid strength weakening and or current flow from the power supply being low or just not giving it enough time to 'grow' the copper crystals on the surface. Agitation helps too.

If running the dryer is a bit costly you could build a vibrating table with a box fan, running on low, laid horizontal on four small boxes holding it 4 inches or more above the counter or floor blowing downward.


As to the foaming: that would be the classic middle school experiment with vinegar and baking soda. There should have been a warning to expect it. Clean up can be done with regular tap water but with any diluting distilled water is the better idea.

Any acid that winds up down the drain is going to react with something until it is used up. If you have metal piping this would be a bad thing. Best to neutralize it with the baking soda and then flush it down the drain.
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Last edited by Speedslug; 2015-02-23 at 3:28pm.
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