-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 7295

Plating a Non-Conductive Coating onto Zinc Die-Castings


I am presently hard anodizing machined aluminum parts for insulating reasons, to prevent hipotting between metal components. Space constraints prevent me from applying a plastic insulator. I looking to die-cast my parts in zinc and am researching the possibilities of a coating for zinc which could act as an insulator.

Stephen Glaser
Telect Inc - Liberty Lake, Washington USA


You probably know this, Mr. Glaser, but your parts could be die-cast in aluminum and you could continue to use the anodized coating as an insulator.

There are no non-conductive electroplatings just due to the way electroplating of metals works. You might be able to electrolytically apply an electrophoretic paint of some sort, but I doubt that it would have robust insulating qualities.

You might want to investigate anodizing of zinc. This is a more exotic technology than anodizing of aluminum because it requires rectifiers which can deliver 100-200 volts, which most plating/anodizing shops don't have and don't want due to the electrocution hazard because most shops use exposed bus bars. Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey


I have heard of a non conductive coating that is called Whycoat; the company that supplies the Whycoat finish is Whyco Technologies in Thomaston CT. Check them out

Brian Lucas
- Wolcott, CT USA

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.