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

-----

Yellow zinc plating with different appearance

1999

We have 2 vendor providing yellow zinc plating on our stamping product which is cold roll steel. One of the vendor able to achieve a uniform yellowish appearance but the other one shows batches of ugly greenwish spot. Both of them using similar chemical.Could anyone help to explain why is there a difference in colour. Thanks.

Lim TW
- Kulai, Johor

Lim, There are several reasons why you will see variance in color. The following parameters would have to be the same @ both vendors shops. 1. chromate concentration 2. bath temerature 3. immersion time 4. method of agitation 5. temerature of final rinse 6. length of time in hot air dryer My guess is that the vendor who is providing the greenish color is probably chromating too long and is using a final rinse which is too hot. I hope this helps. Jeff

Jeff Mills
metal finishing shop - Gorham, Maine
1999

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: