超临界CO₂和H₂S环境中N80钢腐蚀形态及腐蚀膜演化机制

打开文本图片集

中图分类号：TG172 文献标志码：A

Abstract：The corrosion behavior of N8O steel in an environment of supercritical CO2 with a high H2 S content was investigated throughcorosiontests，surfacecharacterization，waterchemistryanalysis，andthermodynamiccalculation.Thisinvestigationrevealed theevolution mechanismofcorrosion morphologyandcorrosionfilm.TheresultsshowthatthecorosionmorphologyofN8Ostelchanges fromgeneralcorrosiontolocalizedcorrosion withtheextensionofcorosiontime.Initially，the predominantcorrosionproductisfeatheryFeS formedbysolid-phasereactions，andtheoverallprotectiveefectof thecoosionfilm isrelativelypor，leadingtoseveregeneralcorrosionofN8Osteel.Afterprolongedcorrosion，thecorrsionproducts transform into crystalline FeS and FeCO3 formed by deposition reactions，and the corrosion film provides overall good protection，slowing down the corrosion of N8O steel. However，the uneven deposition of FeCO3 and FeS induces localized corrosion of the substrate.

Keywords：supercritical CO2 ; H2S ；corrosion；corrosion film；localized corrosion；N8O steel

在碳捕集、利用与封存（CCUS）工程项目中，将 捕集的 CO2 注入油气井中进行驱油（ CO2 -EOR），E」。（剩余15191字）