-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 9195

Laser weldable QQ-N-290 Ni plating


I am working with a SAE-AMS-QQ-N-290 [link by ed. to spec at TechStreet] spec. nickel plating process and am trying to optimize this process for hermetic laser welding (YAG). Typical substrate materials include 6061 Al, stainless steel, Kovar, and alloy 42. Nickel plating thickness usually varies from 50-250 microinches. Our experience has been that sometimes QQ-N-290 Ni plating is very laser weldable and sometimes it is not, regardless of substrate or thickness. I need help determining what the key control characteristics for a laser weldable QQ-N-290 plating bath should be. Are anti-pitting agents (brighteners) going to affect weldability, etc...?

Any help, experience, or direction that you could give me would be greatly appreciated.


Alan Davis
- Wenatchee, Washington, USA


Any brightener added to the electrolyte will cause problems with welding. Wetting agents should not cause problems unless the concentration is extremely high. I would suggest a straight nickel sulfamate.

Russell Richter
- Danbury, Connecticut, USA

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.