Letter 40006

Silver plating Peels off copper  

++++++

We do hard silver plating 10 microns on copper conductors and we are facing peel-off problem. Kindly help.

Is there any specification for checking/inspection of Adhesion of Silver plating on copper parts.

Ajay L. Chaudhary
copper component mfg. - India

If the plate peals from a substrate, the part is either not properly cleaned or properly activated or preplate struck or there are delays in moving from one tank to another or the wrong process cycle. OR, a combination of all of the above.

James Watts
- Navarre, Florida

Hello Ajay,

If you try to plate silver over copper directly this can happen; you need a base coat of copper and strike silver plating before plating on silver.

BR

Khozema Vahanwala Saify Ind   Bangalore, Karnataka, India

I'm working with copper substrate for electronic application. How can I plate copper parts silver 15 microns? Note that parts of copper are (200 cm * 10 cm * 2 mm as thickness) and i have silver plating bath with stainless steel as anode and (50 gm silver cyanide+150 gm potassium cyanide) so where is the problem?
thank you.

hatem shaker
plating shop employee - Egypt

Hi, Hatem. I'm sure the problem is clear in your mind, but it isn't clear to me. Are you successfully plating other parts? Do the parts not plate at all, or do they come out black, or does the plating peel off, or is it stained, or is it off color? Have you tried a Hull cell test? Is there a copper and/or silver strike before silver plating?

Regards,

Ted Mooney, P.E.  finishing.com Brick, New Jersey

I am electroplating excutive. presently I am working on silver plating.what is the reason of anode blackness and anode polrization of silver plating bath? bath condition :- Ag metal- 30g/l, KCN- 120g/l, Amp- .7dm2

Amit Mishra
surface treatments - Haryana, India