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

-----

How to obtain grey passivate on zinc plating

2000

Dear sir,

How to control color of black passivate in zinc with grey color not black finish?

Best regards

prasarn hutpattanasilp
LorYongSeng - Samutsakorn, Thailand

You can obtain a grey passivation on zinc electrodeposits by increasing the phosphate content of a green passivation.

Emmanuel Popesco
Regal - France
2000

(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: