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

Metal finishing Q&As since 1989

-----

A problem with nickel - chrome plating on zinc substrate

I have a problem with nickel-chrome plating on a zinc faucet. Firstly, I do EN plating in the solution of nickel sulphate 20 grams/liter, potassium pyrophosphate 50 grams/liter, sodium hydroxide to raise pH to 9.5. Then, I electroplate the faucet in a copper cyanide solution. However, the trouble always happens at the nickel electroplating process. The inner surface of the faucet seems not to be completely covered by the EN and copper electroplated coating, therefore zinc always dissolves in the nickel electroplating solution, making the nickel coating dark.
I would really appreciate if someone could help

Thanh Phan

2006

(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: