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topic 17897

Replacement For Hard Chrome Plating


2002

I am looking for an alternative coating to replace Hard Chrome on a piston head which slides in a stainless steel cylinder. I am considering Titanium Nitride. The steel cylinder has a hardness of approximately 42Rc.

Tom Fritch
- Valencia, California, USA


simultaneous 2002

Gee, Tom, since you work for the competition, I'd say it's an EXCELLENT idea! Simply marvelous! Oh, and make sure you select a cathodic arc process, as well, for better seal life! : )

(Gosh, I'm biting my tongue so hard here I can taste the blood...)

Seriously, chat with Kim Bodily or Dan Loveless at your Utah facility before you go too far. Good luck!

lee gearhart
Lee Gearhart
metallurgist



2002

Hard chrome has much better oil retention and lower coefficient of friction. In what way is the hard chrome less than satisfactory?

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey
We need "Aloha" now more than ever


2002

Chrome Nitride may be a better choice. However since hard chrome is typically deposited much thicker than standard PVD CrN, you will want to consider how a thinner replacement may affect the application whenever replacing hard chrome with PVD coatings.

Jeff Ostman
- Olten, SWITZERLAND



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