Investigations of corrosion films formed on API-X52 pipeline steel in acid sour media
Investigations of corrosion films formed on API-X52 pipeline steel in acid sour media
- Neue Suche nach: Hernandez-Espejel, A.
- Neue Suche nach: Dominguez-Crespo, M.A.
- Neue Suche nach: Cabrera-Sierra, R.
- Neue Suche nach: Rodriguez-Meneses, C.
- Neue Suche nach: Arce-Estrada, E.M.
- Neue Suche nach: Hernandez-Espejel, A.
- Neue Suche nach: Dominguez-Crespo, M.A.
- Neue Suche nach: Cabrera-Sierra, R.
- Neue Suche nach: Rodriguez-Meneses, C.
- Neue Suche nach: Arce-Estrada, E.M.
Corrosion films formed by voltammetry using different switching potentials and by immersion on API-X52 pipeline steel in simulated acid sour media (NACE ID182) have been characterized using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Linear Polarization and Electrochemical Impedance Spectroscopy (EIS) techniques. The aim of the work was to investigated the effect of film composition, morphology, thickness, and protective characteristics of corrosion products. The composition of the NACE solution was: 1.64 M NaCl, 0.055 M CaCl2, 0.018 M MgCl2.6H2O, 0.77 M CH3COOH, 0.29 M Na2S.9H2O and 9.3x19-4 Na2S2O3 at pH 5.68. XRD and EDS analysis showed that the films are mainly composed of sulphide compounds (mackinawite, troilite, marcasite and pyrite) as well as iron oxides, as steel damage increases. Across SEM micrographs the corrosion films formed by potentiodynamic and immersion tests are very similar, covering most of the steel. Polarization and EIS results corroborate poor behavior against corrosion.
Dokumentinformationen
Investigations of corrosion films formed on API-X52 pipeline steel in acid sour media
Untersuchung von Korrosionsschichten auf Rohrstahl API-X52 im sauren Medium
Corrosion Science ; 52 , 7 ; 2258-2267
2010
10 Seiten, 11 Bilder, 2 Tabellen, 27 Quellen
Aufsatz (Zeitschrift)
Englisch
Korrosion , Rohrstahl , Simulationsversuch , Pipeline , saure Lösung , Sulfid , Korrosionsprodukt , Passivschicht , Eisenoxid , Schichtdicke , chemische Zusammensetzung , Oberflächenmorphologie , zyklische Voltammetrie , Polarisationskurve , elektrochemische Impedanzspektrometrie , Röntgenbeugung , energiedispersive Spektrometrie , Rasterelektronenmikroskopie , anorganische Schwefelverbindung
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