Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

pub
Free personalized metal finishing help!


Red spot in gold barrel plating



(-----) 2004

I had a big problem about Gold barrel plating on Fe material please advise me as your possible,Our process is Electrocleaning --> Acid dip --> nikel plating --> Au Strike --> Au plating After that I found the small red spot on plating area and I thought in the nikel process was no good,but after change nikel chemical its still happened.Now,i don't understand and no idea to prove and preventive this defect.Could somebody advise to me as soon as possible. Thank you

Korek
plating shop - Bangkok, Ayuttaya, Thailand
^


2006

I believe the red or orange dot you are getting id the complex nickel tetra cyanide. Try use the cation -ion exchanger to remove the nickel cation. The gold cyanide complex will remain since it is anion. If not you can try to treat the bath with poly sulfide but it stink like crazy though. Good luck

Vorakarn Mutsalkilsana
- Los Angeles, California, USA
^

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2022 finishing.com, Pine Beach, New Jersey, USA