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High Temperature PVD Coatings for Gas Burners & Firepits

Q. Are there any gold colored PVD coatings that can handle high temperatures? I need something that can handle 900 °F. I have tried Titanium nitride and that oxidizes and turns silver. I believe 10k gold could work but that may be prohibitively expensive.
The application here is for gas burners on cooking products. Currently the brass components oxidize and turn dark & ugly.

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Surface Topography Effects on Functional Properties of PVD Coatings by Pan & Drnovsek (2023)
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The Foundations of Vacuum Coating Technology by Donald M. Mattox (2018)
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Properties and Processing of Vapor-Deposited Coatings by Lee, Johnson, Sheldon & Pickering (2014)
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Handbook of Physical Vapor Deposition (PVD) Processing by Donald M. Mattox (2010)
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The Influence of Macroparticles on PVD Coatings by Guido Vergnano (2009)
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Q. Hi! Need to know if PVD coating is FIRE/HEAT RESISTANT ... I am thinking to use it on some fire pits?

A. PVD coatings are deposited at very high temperatures for wear resistance, typically in the range of 400 to 500 °C, but the PVD coating itself can withstand much higher temperatures -- depends on the specific coating. Problem is not the PVD coating, then, but the substrate/coating combination. If your substrate is stainless steel, you should be in good shape.

Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover
San Diego, California

Q. Looking for PVD Coating which can withstand up to 500 °C. It's the direct heat on product.

? What is the application, why do you need it?

H R Prabhakara
- Bengaluru

A. All nitrides function well at 500 °C, and it is a good temperature for coating carbide tools. So you are good with ZrN, TiN, and TiAlN -- and a whole host of other compounds.

Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover
San Diego, California

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