-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics

topic 4154

Poor adhesion of Nickel plated onto Nickel


Hello, I'm an Italian student in electronic engineering and I need some information on Nickel electroplating for my thesis. In my thesis I must plate nickel from a nickel sulfamate bath onto a seed of nickel, obtained by thermal evaporation, through some photoresist mold (like the liga process). After plating I obtain nickel structure of some micron in thickness but these structure have a very poor adhesion to the nickel seed layer. I have tried to polish the nickel seed layer (before plating) with a dipping in a solution of HCl and water (10%) but the results are the same.

I will be very grateful to you for an hints to resolve my problem.

with best regards

Andrea Morini
- Pisa (Italy)


Hi, Andrea. You need a Wood's Nickel Strike (or perhaps a sulphamate nickel strike). Nickel passivates quickly, that is, it grows a thin layer of tarnish. You can't plate onto tarnish; rather you need this high-acid nickel strike to simultaneously attack the tarnish and deposit fresh nickel.

Dini's "Electrodeposition" has a great chapter on nickel strikes and adhesion. Good luck.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT 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

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.