Pump SDSS corrosion in sour water and chloride application 1

[midris]

Hello,

A Client has asked for solutions to a corrosion problem they are having on an injection pump. Below are the process parameters:

- Operating temperature is 54 degC
- Sour water service
- Chloride levels are in the 1000ppm order (definitely below 100,000pm) but not known exactly
- MOC of casing and impeller is SDSS

The client reported corrosion even when using SDSS, and require corrosion resistant alternatives. To my knowledge, SDSS can withstand pitting corrosion in high chloride services (not sure about the ppm limit) up to around 35 degC.

Any suggestions? Would Hastelloy fare better here?

Thanks,
Maen

 

[EdStainless]

Which alloy are they using specifically?
Is the solution oxegenated? (allowed to come in contact with air)
As produced waters like this are free of oxygen and you don't need alloys with a lot of Cr to stand up in them (Ni-Resist is common).
With oxygen added you need very high Cr+Mo to stand up in this environment.

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