High Temperature corrosion

Hi all;

I have difficuties in finding information to solve following practical situation.

How to calculate corrosion rate of AC HK alloy in air at 1600 F running for a 100 hrs test period?
I would appreciated any help.

 

[cloa]

What is AC HK Alloy?

 

[stanweld]

What is the corrosion medium? Air?

 

[demsha]

Hi
Thanks for your replies. I believe AC HK alloy is HK40 which is Cr/Ni high temperature resistance alloy. It has been using reformer tubes in Hydrogen furnaces in refineries. The medium is AIR.

RELATED SPECIFICATIONS
ASTM: A 297 (HK); A 351(HK30 and HK40); A 567 (HK40 and HK50 - specification discontinued in 1987); A608
(HK30 and HK40)
Nearest wrought grade: AISI 310.

Thanks

 

[stanweld]

The oxidation rate in air is less than 0.010 inches (0.1 mm) per year.

 

[demsha]

Thanks Stanweld. Can you tell me how did you come to this number? I mean calculations steps.

 

[Walterke]

You should be doing your homework yourself.

NX 7.5.5.4 with Teamcenter 8 on win7 64
Intel Xeon @3.2GHz
8GB RAM
Nvidia Quadro 2000

 

[stanweld]

The information is in published literature, in the Metals Handbook and other sources. It is based on empirical measurements - not on calculations.

 

[demsha]

Thanks

 

[Guest102023]

There is at least one Nickel Development Institute publication covering this. Just google them.

 

[Guest102023]

http://www.nickelinstitute.org

 

[tomwalz]

If it is homework use air.

If it is real world, find out what the composition of the air axctually is.

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

 

[TomEun]

If your concern is the corrosion rate calculation for high temperature oxidation, please find the Air Corrosion Nomograph of Fe-Ni-Cr alloys in “Corrosion Engineering” by Fontana.

Thomas Eun