netneut
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


Finishing.com has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
HomeFAQsBooksHelpWantedAdvertiseForum
topic 2617

I need a chemically en wear resistant coating for nickel


(1999)

In one of the process steps of a new process, that we are developing, we need to coat a nickel plate with a chemically and wear resistant coating. The coating should not contain any (heavy) metals. The layer thickness should be as small as possible (not exceeding 10 microns) The chemical environment is largely water with some formic acid (pH=2). Does anyone have suggestions for a suitable coating? How can I improve adhesion of the coating onto the Nickel?

Glenn Rexwinkel
- Netherlands


(1999)

I sort of doubt if you will find an excellent answer.

A spray and bake Teflon coating is going to be very thin, less than 0.0004". Most spray on coatings are going to have at least a few microscopic bubbles, which will be a prime source for attack on the nickel.

A thin coating of Teflon will lower the coefficient of friction, but certainly would not qualify as a wear coating.

Grit blasting the surface with fine grit will improve the adhesion of any spray on coating.

There may be a PVD coating like titanium nitride that could have a chemical resistance to Formic Acid, but it is so unusual that corrosion testing has not been done. Possibly a thin layer of the equivalent of diamond by PVD might do.

James Watts
- Navarre, Florida


(1999)

Look into Diamond-like-carbon (DLC) coating for your application.

Mandar Sunthankar
- Fort Collins, Colorado



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 This Week's HOT 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.