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High Temperature corrosion

High Temperature corrosion

High Temperature corrosion

(OP)
[smile]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.

RE: High Temperature corrosion

What is AC HK Alloy?

RE: High Temperature corrosion

What is the corrosion medium? Air?

RE: High Temperature corrosion

(OP)
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

RE: High Temperature corrosion

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

RE: High Temperature corrosion

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

wavey2

RE: High Temperature corrosion

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

RE: High Temperature corrosion

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

RE: High Temperature corrosion

(OP)
Thanks

RE: High Temperature corrosion

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

RE: High Temperature corrosion

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.
www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.

RE: High Temperature corrosion

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

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