Hobbyists & Industry luminaries alike learn on every visit
(we earn from 'affiliate link' purchases)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

-----

Discoloration after passivation

Well we are doing the pickling and passivation of cladded ( Inconel 825 ) pipes. Well the problem is, during and after cleaning we are getting, yellowish/ greenish in color. What would be reason ?

thanks and regards

Navin Kumar Tiwari
- Dubai, UAE
February 110, 2011

Please give info as for the process you use so we can try to figure where the problem comes from.

Sara Michaeli
Tel-Aviv-Yafo, Israel
February 17, 2011

Navin

Does Inconel 825 need to be passivated?

Being a high nickel content material, I would suspect the yellow-green color is from the nickel.

Willie Alexander
- Colorado Springs, Colorado
February 19, 2011

(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: