-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 3692

Black Chromate Alternatives


I would like to implement a blackening process into an automated zinc electroplate line. All parts that need blackening will be low carbon steal. I've looked into black chromate, however EHS issues have brought this project to a screeching halt. Can anyone help me determine an alternative to black chromate that will not have severe EHS issues, can be implemented into an automated line, and produce a black appearance similar to black chromate? Is there any black dye's that may work? Corrosion resistance is not a serious concern. Thanks for your help

Michael Ronzello
- Plainville, Connecticut




Arie Porat
furniture mfgr. - Israel


Arie is right, black e-coat is excellent but regretfully quite expensive to start with. You can use a blackening process based on nickel-zinc for electroplated zinc. It is not chromated and therefore does not have the same corrosion resistance as a chromate but it is black and uniform. I am not talking about a zinc-nickel alloy plating, it is a zinc nickel blackening process.

sara michaeli
sara michaeli signature 
Sara Michaeli
chemical process supplier
Tel-Aviv, Israel


Michael, I know Canning-Gumm had a dip black lacquer product that produced a good black. Macdermid has now absorbed Canning-Gumm so they may still offer the product. I believe it was called "Black Top Seal".

J. Pons
- Greenville, South Carolina

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.