No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE 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

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: