Material Selection for Phosphorous Acid Injection

[ImInMaterial]

Would super-duplex stainless steel be a suitable long-term material for tubing in a system injecting a mixture of about 70% phosphorous acid, water, 0.02% hydrochloric acid, and up to 4% methanol-based corrosion inhibitor at Gulf of Mexico ambient temperatures? Must also consider certain amount of chlorides (maybe up to 300 ppm).

Suggestions and further questions certainly welcome.

 

[EdStainless]

Well, considering that your options are the G type alloys (G30 or G31) I would consider it.
What is your max temp when the well if flowing?

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