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Acceptable temperature range for applied Hard Chrome

Q. I am looking for some information on operating temperatures that the applied hard chrome is able to handle before braking down. Is there any information on this ? I have been looking at a few places but can't find them. Thanks for the help !

Mike Deye
plating shop - Toledo , Ohio
2004

A. Mike,

In higher temperature than 400 °C reduces the hardness, with temperatures up to 800 °C will show a hardness around 200-250 Hv. Also the fatigue strength reduces. The deposit goes from grey colour to a green oxide.

Regards,

Anders Sundman
4th Generation Surface Engineering
Consultant - Arvika,
Sweden
2004

A. Hard chrome plating looses 10% of its hardness at 200 °C, 25% at 300 °C, 40% at 400 °C, over 50% at 500 °C. Beyond that it is a long road to melt it. I don't understand what you mean by "break it down", but it certainly is not considered an excellent choice for high temperature applications, specially in heavy layers since its cracked structure exposes the substrate with all sort of consequences.

Guillermo Marrufo
Monterrey, NL, Mexico
2004

Properties of teflon only good for 600 °F

Q. I am in need of a tough coating with high lubricity and a temperature range up to 600 °F.
It has to put up with people scraping it with metal spatulas, scrubbing, and still release a wide variety of food easily.

nick Kreigh
Mechanical Engineer - Hicksville, ohio, USA
February 12, 2019

Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)

A. Hi Nick. As you see, we added your inquiry to a thread about hard chrome plating because it may be the coating you are looking for :-)

Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
February 2019

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