Aluminizing of thermal oxidizer wire mesh

[kevlar49]

We have had some failures on an Inconel 600 wire mesh in a Marine Vapor Recovery Thermal Oxidizer. The thermal oxidizer takes vapors during shipping and reciving of crude shipments and burns it with excess oxygen and fuel gas. I'm checking on the quality of the fuel gas now.

I was wondering if anyone has successfully aluminized 310 stainless steel (more readily available and less costly than Inconel 600) for this type of application. The max temperature (due to furnace trip) is 2100°F. I don't think it sees that continuously, but it could be in the neighborhood of 1300-1900°F.

Any thoughts/experience?

 

[btrueblood]

Why would you aluminize 310 stainless? 310 by itself might work just fine.

Inconel 600 is pretty robust stuff, but it doesn't have much as much oxidation resistance beyond 1500-1600 F as more chrome-rich alloys. Try alloy 617 or 718. Another consideration: how are you supporting the screen? No material is going to have much strength at these temperatures, and the wire will fatigue rapidly from what you'd otherwise call very slight pressure fluctuations.

 

[kevlar49]

Reason why not 310 by itself, was I thought it did not have the oxidation resistance of Inconel 600. Screen is supported by Inconel 600 pins, but the problem seems to be either embrittlement or or wastage (blackened surface). Thought it might be due to sulfidation. Someone speculated that it was due to adverse phase formation.

 

[Compositepro]

The melting point of aluminum is 1200F.

 

[unclesyd]

Aluminizing, Siliconizing ,and Chromizing are all being do to protect alloys at high temperatures.
Here is a very good paper that has come very good information on all the processes currently being used.

http://www.ecm.auckland.ac.nz/course/cm423/423 Teaching Chapter-2d Processing.pdf

Compositepro,

What you want is Al Oxide of which the majority of the coating is.