Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Chrome misplate
Q. Is it possible for less than specify bright nickel thickness on parts to cause chrome misplate? (for example nickel spec. is 25 µm , actual nickel thickness 18 µm .)
Popatbhai B. Patel
electroplating consultant - Roseville, Michigan
2002
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A. No, I don't think that's the problem. Plate a Hull cell panel with 18 microns (or less) of nickel, then plate it with your chromium solution and tell us what happened.  Ted Mooney, P.E. Striving to live Aloha finishing.com - Pine Beach, New Jersey A. The lesser thickness is not the problem. Look for something else..!  Khozem Vahaanwala Saify Ind  Bengaluru, Karnataka, India  |
A. I would look at improper activation or excessive brightener.
James Watts- Navarre, Florida
A. Popat,
Adding to previous responses, the same reason that caused the thin nickel could be causing the chrome misplate as chrome has less throwing power. So, I would look for anode placement, part geometry, time in bath, voltages, etc. By the way, you didn't mention the substrate.
Guillermo MarrufoMonterrey, NL, Mexico
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