Inconel 718 and chlorides
Inconel 718 and chlorides
(OP)
I have been reading several threads regarding Inconel 718 and chlorides. Sometimes this combination is not recommended and sometimes it is. Would anyone be able to help me clarify why?
A vendor is offering us a 718 spring instead of X750. The process stream is mostly oil with a few % water (the water contains chlorides - mostly sodium chloride, although some magnesium and calcium chlorides are probably present). Operating temperature is 240F. Since 718 has 50% nickel content, and the chlorides should be neutral (not acidic), would 718 be suitable for this service? I do not understand why 718 would be susceptible to chloride SCC.
Thank you very much!
A vendor is offering us a 718 spring instead of X750. The process stream is mostly oil with a few % water (the water contains chlorides - mostly sodium chloride, although some magnesium and calcium chlorides are probably present). Operating temperature is 240F. Since 718 has 50% nickel content, and the chlorides should be neutral (not acidic), would 718 be suitable for this service? I do not understand why 718 would be susceptible to chloride SCC.
Thank you very much!





RE: Inconel 718 and chlorides
I think that it has to do with the precipitation hardening mechanism.
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Still trying to help you stop corrosion.
formerly Trent Tube, now Plymouth Tube
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RE: Inconel 718 and chlorides
NASA-STD-P025
http://
High Performance Age-Hardenable Nickel Alloys Solve
Problems in Sour Oil and Gas Service
http://
RE: Inconel 718 and chlorides
S.
http://www.corrosionist.com