Evaluation of critical flow intensities for FILC in sour gas production
- Iserlohn Univ. of Applied Sciences (Germany). Lab. for Corrosion Protection
- BEB Erdgas und Erdol GmbH, Hannover (Germany)
Using submerged jet impingement experiments critical wall shear stresses for initiation of flow induced localized corrosion (FILC) were evaluated for the system carbon steel/aqueous polysulfide containing monoethylamine (MEA) solutions/H{sub 2}S (22 to 42 bar). Due to an extraordinary MEA concentration effect the critical wall shear stress at 130 C was about 90 N/m{sup 2} in 2.4 M MEA but only 2 N/m{sup 2} in 5 M MEA solution. Inhibition could increase this low value to 17 N/m{sup 2}. Wall shear stresses up to 53 N/m{sup 2} could be reached by precorrosion under subcritical flow conditions and use of an inhibitor yielding sulfide scales with significantly enhanced FILC resistance. The change in FILC susceptibility is accompanied by a change in scale morphology and thickness. In order to quantify erosion corrosion intensities developed by a submerged jet stream, surface roughness profiles were correlated via frequency analysis with wall shear stress related dimensions of impact transferring volume elements of eddies in the hydrodynamic boundary layer.
- OSTI ID:
- 352534
- Report Number(s):
- CONF-980316-; TRN: IM9928%%128
- Resource Relation:
- Conference: Corrosion `98, San Diego, CA (United States), 22-27 Mar 1998; Other Information: PBD: 1998; Related Information: Is Part Of Corrosion `98: 53. annual conference and exposition, proceedings; PB: [6600] p.
- Country of Publication:
- United States
- Language:
- English
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