| Search our quarter-million Q&As |
Home of the finishing HOTLINE since 1989
-----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:
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
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.
Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.