finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
(current
topics)
topic 12293

Hexavalent free chromate and silver free black chromate


(2002)

We are a zinc electroplating job shop having excellent expensive success applying hex free chromate on top of zinc and alloys but only to clear/iridescent color!

My question is "Does anyone have a hex free, silver free black chromate to apply to zinc and/or zinc alloys?"

Cliff Roy
Cliff Roy
plating shop - Conestee, South Carolina


 

Cliff,

I too am in need of black tri-chromate for zinc-nickel alloy.

Over the past several months, I have talked to many major chemical suppliers. The general feeling that I get is that replacement hex free chromates are first be available for the most popular chromate conversion coatings first such as zinc yellow for example. Since black conversion coating, especially for zinc-nickel, are not as common, they will be last one developed, tested, and marketed. So far in my search, I had no luck yet.

Karl Weyermann
- Lebanon, Kentucky


 

There are a few plating chemical suppliers working on it, but I have not yet heard of one of these systems making it from the experimental stages to being ready for production use.

When it comes out, I expect it will be for use on zinc-iron or zinc-iron-cobalt platings. This type of zinc alloy is easiest to get a good black on. Black is probably the hardest color to create from a technical standpoint.

tim neveau
Tim Neveau
Rochester Hills, Michigan


 

The manufacturer of Chromiting, Surtec GMBH has a black version of Chromiting for use on zinc and zinc alloy surfaces. This is purported to be non silver, trivalent.

Gene Packman
process supplier - Great Neck, New York


(2005)

Do the Vendors have "Hexavalent Free Silver Free Black Chromate" for Zinc Plating yet?

Mathew Schaefer
- Chilton, Wisconsin



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 Q or A 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


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.