-- The Home Page of the Finishing Industry

on this site
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 54555

Successfully Plating Cobalt on Beryllium

March 9, 2010

I have been trying to plate cobalt onto pure Beryllium to only varying degrees of success. I will ultimately be using the Beryllium for x-ray tube window. Very tiny window. I need about a 2 micron layer only.
I have found patents with formulas for cleaning, etching and for the electrolyte itself, made of Hydrous Cobalt, Ammonium sulfate and water. I use stainless steel anodes. Since I am working with such small pieces I put roughly 3 volts that equals roughly 1.0 amp depending on the distance (though I have constructed a small jig that keeps that pretty uniform for each test).
Here's the problem, the cobalt can be peeled off and I need to put the window under vacuum and heated conditions, so we want good adherence. I have tried many acids for etching to no avail and acetone seems to be the best cleaning technique (used ultrasonic cleaning one time in the acetone as well).
Have you any luck successfully etching Beryllium to adhere to the Cobalt?

Nicki Schoolmaster Ouali
R&D Physics Technician - Ypsilanti, Michigan, USA

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.