Super Duplex or Nickel Alloys

[sssahoo]

I am a newbie in materials selection for petroleum production related project. I am having problems in selecting materials when the environment is highly conducive to pitting. Should I go for Duplex/Super Duplex/Alloy 625 or Alloy 825.

We will encounter very high CO2 and Cl-. Also, the operating temperature is around 90 C.

 

[jbeckhou]

See attached doc. Might help you out.



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[sssahoo]

Hello Jbeckhou,

I appreciate your help. However, I am looking for "Performance" of the following steels in a specific environment (10 % CO2 (mol. fraction, 8000 mg/l Cl- ions and roughly 13000 MPa pressure):
1. Duplex Steels, 2. Super Duplex, 3. Alloy 625 and 4. Alloy 825.
I need to know the performance of the above steels when pitting and crevice corrosion are potential issues.

Best regards,
Samay

 

[jbeckhou]

So you are looking for the Pren rating for the above materials?

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