Question #f364e

1 Answer
Mar 1, 2017

Not really, unless there are extremes.


The plating is only dependant on the number of copper ions that lose their charge by gaining electrons from the cathode:
#Cu^(2+) (aq)+ 2e^(-) ->Cu (s)#

And the number of electrons is only dependant on current and time.

But :
If current is very low (or zero), and #Cu^(2+)# concentration is high, some zinc from the brass alloy may exchange charge with the copper ions: #Cu^(2+) + Zn ->Cu + Zn^(2+)#

And if the concentration of #Cu^(2+)# is very low and the current is high, hydrogen may form at the cathode, which will lower the copper gain.