-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 11758

Alternative to zinc dichromate for in-house finishing?


We are a company that manufactures automated equipment. We also manufacture a great deal of carbon steel parts for the equipment that we design. Our current alternative to painting for some parts is zinc dichromating. We would like to finish the parts we manufacture in house with a process that will offer similar corrosion resistance at possibly a lower cost with less environmental hassle. I am familiar with processes applied to stainless steel and aluminum but do not know what is available for the carbon steel family. Can you suggest a process to further research?

Scott Mercurio
Port Huron, Michigan


You may want to investigate the Dacromet process, which is a way of putting zinc onto the surface for sacrifical protection from a water-base "paint".

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey


Hi Scott ,

There is a big push by the motor companies for a Tri - Valent Chromate Conversion coating on top of Zinc Plate that is clear in color and offers the same or better corrosion resistance that current Yellow chromate does , but I'm afraid it is not cheaper ,The finish you are currently using is amongst the cheapest of decorative / industrial finishes available unless you want to consider paint or powder coat . Your current supplier should be aware of the new Tri - Valent chromates.


John Tenison-Woods
John Tenison - Woods
- Victoria Australia

If you have a question in mind which seems off topic, please 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.