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Letter 5091
Copper Plating
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Hi ppl, I'm plating copper alloy with copper using a high
efficiency copper cyanide bath. Using copper anode, we control the
free cyanide at 3-4 oz/Gal, copper at 4-5 oz/Gal. The pH is around 13
with temp at 65 C. The problem is whenever I use copper alloy 7025,
red spots can be seen on the surface. But none seen when I use
different type copper alloy, eg. Olin 194. Does anyone experience
this situation? The current density range from 80 - 200 ASF.
I would be grateful if someone could explain what causing this.
Thanks.
Deen
- Malaysia
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Hello, I am in the need for info re: high purity copper plating
over high purity copper piece (101 OFE - Outukumpuo's best). I need
to equal the low oxy and physical requirements. Thanks, Paul
Paul Olderr
Fermilab (DOE) - Batavia, IL
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Sorry I can't be of help here. I am very curious however, why
someone would be interested in plating copper over copper?
W. Carl Erickson
- Rome, NY
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