
plating, anodizing, & finishing Q&As since 1989
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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
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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 metallurgist - E. Aurora, New York 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, P.E. Striving to live Aloha finishing.com - Pine Beach, New Jersey |
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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