Acceptable temperature range for applied Hard Chrome

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,

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.

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.

Ed. note: This RFQ is outdated, but technical replies are welcome, and readers are encouraged to post their own RFQs. But 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
Need quick confidential answers? $25
Need project assistance? $100/hr.
February 2019