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Citpric pickle solution problem


#1

I have been using Citpric Pickle solution as a safe alternative for
over a year now. It works well and until the other night, I havent
had a problem. My work became copper plated! This is something that
Citpric is not suppose to cause, ever. I contacted Gesswien where I
buy it, and they have no idea why it happened. If anyone does,
could you let me know, Its not fun removing the copper from my work,
as I am sure you all know.

Daniel Hamilton


#2

Any pickle solution (sparex, citric, sulfuric etc.) that becomes
heavily loaded with dissolved metals ( in your case copper that has
been reduced from the oxides that you pickle off your work) will act
as a plating bath if you get iron in it. So some how you got some
iron in the pickle at the same time the work was in there and
created a electrolytic cell which plated your work. Remove the iron
from the bath and the problem goes away.


#3

Pink oxide removal is a snap! Go to this page and see the
instructions for hydrogen peroxide pickles.

http://www.reactivemetals.com/data/d_h2o2instr.html

I developed this in graduate school at the U of Kansas around 1980.
It is all drugstore/grocery products and strips off pink oxides in
seconds. We charge 50=A2 if you want a copy mailed to you. Bill


#4

Hi Daniel, Daniel here. You mentioned the trouble of removing
copper plating form your work. Are you using silver or gold? if so,
can you not just oxidize the copper surface with a gentle sweeping
flame (to encourage oxidation) and pickle the cuprous oxide from the
piece? I do this with accidental plating. Sometimes takes a couple
of go-rounds, but it works for me.

Danny