Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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

The authoritative public forum
for Metal Finishing since 1989
-----

Pit observed after zinc nickel plating

Q. we do Alkaline Zinc nickel plating for carbon steel (EN24). After plating, we observed pit marks in some areas, and there is no pit mark in base metal before plating.
Our chemistry is:
Zinc: 6g/l; Ni: 1.05g/l: NaOH->95g/l.
What could be the reason for this issue?

kaoushik Murali
Plating shop Employee - coimbatore, TN, India
January 25, 2016

A. Hi kaoushik. Under low power magnification like a jeweler's loupe, are these pits bright and hemispherical or are they rough/random shaped and dark?

Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
January 2016

Q. The pits looks random shaped. Is it because of less brightener in bath?

Kaoushik Murali [returning]
- coimbatore, TN, India
February 5, 2016

(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: