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Plating Silver on Hafnium

We have a customer asking us to plate a 95.5% hafnium/.5%zirconium pin with silver.

We have tried several methods, including copper strike and palladium seed/electroless nickel, to put an undercoat prior to silver plate. In all cases, adhesion has been extremely poor.

Does anyone have any experience with this material, or have a guess as to a method to achieve good adhesion? Thanks in advance.

Chris Ford
N. Andover, Massachusetts
2000

Hi All:

publicly reply to Chris Ford

"Hafnium in Nuclear Engineering"

on AbeBooks

or Amazon

(affil link)

There are patents covering methods for plating onto these alloys, a reference is "Modern Electroplating", by Lowenheim [on AbeBooks, eBay, or Amazon affil links] , John Wiley & Sons, 1974, p.618-635.

The method I read is too complicated to answer here, involving heat treating, fluorides, ultrasonics, etc. A problem seems to me the difference in the thermal coefficient of expansion of the two alloys and the plating.

Tom Pullizzi
Falls Township, Pennsylvania
2000
publicly reply to Tom Pullizzi

Best regards,

COLIN HUMPHRIES
- POTTERS BAR, HERTS, ENGLAND
2002

ATTN: CHRIS FORD We notice on this website that in 2000 you were looking for a solution to silver plate hafnium. We have the same problem and are trying to either silver or nickel plate hafnium prior to brazing. Did you find a solution? If so, can you share it with us? Await your reply.

publicly reply to COLIN HUMPHRIES

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