orrosion of stainless steel AISI 316L has been studied in NaCl solution with combined gas of H2S and CO2 for simulating the environment of oil and gas pipelines. A synergistic effect of high concentration of chloride and H2S on oxide formation and metal dissolution has been studied on 316L stainless steel by electrochemical measurements, inductive coupled plasma (ICP) and X-ray photoelectron spectroscopy (XPS). Chloride concentration had a significant effect on semiconductor properties of the oxide film, while the gases had little effect. A relatively high concentration of sulphur was found inside the oxide formed in a high chloride concentration electrolyte with high H2S compared to the oxide formed in low concentrations, which indicates that sulphur entered the oxide film through local weakening of the oxide by the chloride. Cr and Mo were enriched in the oxide film by selective dissolution of Fe and Ni into the electrolytes.
Corrosion of stainless steel 316L in simulated formation water environment with CO2-H2S-Cl(-)
Korrosion von nichtrostendem Stahl in simuliertem Flözwasser mit CO2-H2S-Cl(-)
Corrosion Science ; 51 , 12 ; 2811-2819
2009
9 Seiten, 9 Bilder, 6 Tabellen, 36 Quellen
Aufsatz (Zeitschrift)
Englisch
Korrosion , austenitischer nichtrostender Stahl , Natriumchlorid , Schwefelwasserstoff , Synergismus , Konzentrationseinfluss , Simulationsversuch , Pipeline , Erdölabbau , Grundwasser , Flöz , Oxidschichtbildung , Halbleitereigenschaft , Polarisationskurve , EIS (elektrochemische Impedanzspektrometrie) , induktiv gekoppeltes Plasma , Oberflächenanalyse , Röntgenphotoelektronenspektroskopie , Chrom-Nickel-Molybdän-Stahl
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