Coupling CS flange with super SS ring joint / Galvanic corrosion likelihood 1

[ENPMAT]

Dear All,
Can anyone inform if galvanic corrosion could take place when coupling CS RTJ Flanges with super austenitic SS (904 L) ring joints in sea water environment ?

Regards

 

[EdStainless]

Yes, and the corrosion of the CS is all that will keep the 904L from corroding.
It is not a seawater suitable alloy.

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Plymouth Tube

 

[sk10009]

Yes.
you can find galvanic series in seawater at internet.

http://www.corrosionist.com/Galvanic_Series_of_Metal_in_Seawater.htm