Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Rack stripper formula

Does anybody know of a good, non-proprietary formula for stripping acid copper,tin/lead plating racks? I would like something nitric acid based but stabilized against NOx release.

Thanks,

Scott Campbell
- Tempe, Arizona, USA
2003

What substrate are your racks made of?

Casey Weizel, President
Foresight Finishing LLC

- Tempe, Arizona

2003

Various things have been suggested to minimize NOX NH4 e.g., NH4NO3, urea nitrate, sulfamic acid [on eBay or Amazon] as additives to 50-70% nitric Be careful try in small trial tank first Also try floating a 1 inch layer of thin paraffin oil. This is surprisingly effective.

Geoffrey Whitelaw
- Port Melbourne, Australia
2003

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

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: