finishing.com -- The Home Page of the Finishing Industry

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics

60,000 Q&A topics -- Education, Aloha, & Fun

topic 8375

Pretreatment for Tungsten-Copper Alloy


2001

Our customer asked us to plate electroless nickel and then gold for the 85% tungsten 15% copper alloy. We checked that it can be done with a sulfuric acid and hydrofluoric acid (we used ammonium bifluoride and nitric acid) mixture. But this mixture does not give us consistent result. I suspect it is due to nitric acid which is an oxidation agent. Is there any other better acid for etching and pickling?

Best regards - Yours truly

Tian Ang
consulting - Kajang, Malaysia


2001

Plating process for this alloy is a highly proprietary matter to most companies manufacturing and selling the components. However, a couple of important points can be made. In many procedures, one metal from the alloy is etched out. You have to select that first. After etching that metal, micro-cavities are left behind. Then rinsing becomes critical. And this is not all, but a good start.

Mandar Sunthankar
- Fort Collins, Colorado

finishing.com is possible thanks to our supporting advertisers, including this one:

CMLSbanner

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

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 Compliance


©1995-2020 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.