As an Amazon Associate & eBay Partner: we earn from qualifying purchases

Ask Grok.com, or ChatGPT, or Google: "Best website for metal finishing questions?"

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
finishing.com -- The Home Page of the Finishing Industry


  -----

Nickel surface treatment solution wanted




February 24, 2012

Q. Hi

I have a problem where nickel plating surface is not so good. As I think, the nickel process works well with Reel to Reel type plating.

I found nickel plating surface failure in the middle of working, there is no [known] changed working condition..suddenly happened.

Nickel plating surface got so many rounded projections (shown in photo / SEM x 3000).

58321-1  58321-2  58321-3

I don't know how to deal with it. I am waiting for your help!

-working condition-

1. Reel to Reel type / velocity : 4m/min / phosphor bronze
2. Nickel 600 g/l, boric acid 40g/l, Nickel Chloride 6 g/l
3. Solution temp. 55~60 degree
4. Current density 29(A) / voltage 5.5(V)

Hyo Hoon Kim
- Ansan city, Kyounkido, South Korea

Just to clarify: your nickel concentration is 600 g/L? Is that even possible?

John Reid
- Brisbane, Queensland, Australia
February 27, 2012



February 28, 2012

I checked the concentration of nickel.
600g/L is right..
Nickel bath volume is 300 Liter. Net nickel solution volume is 250 Liter.

Hyo Hoon Kim
- Ansan city, Kyounkido, South Korea



February , 2012

Hello, Hyo.

You undoubtedly mean 600 g/l of nickel sufamate, Ni(NH2SO3)2 or Ni(NH2SO3)2.4H20, not nickel. 600 g/l nickel would indeed be impossible.

This looks like the beginning of nodule growth, which in turn sounds like brightener/addition agent problems, although we probably can't rule out a mechanical failure of a solution jet or something like that. Can you do a Hull Cell ⇦ huh? test or a stress tabs test to see if anything can be learned about what happens at other current densities?

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha

finishing.com - Pine Beach, New Jersey

Ted is available for instant help
or longer-term assistance.





No dead threads! If this page isn't already on the Hotline your Q, A, or Comment will move it there.

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:

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


About/Contact  -  Privacy Policy  -  ©1995-2025 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"