Effect of O2 on corrosion of 3Cr steel in high temperature and high pressure CO2–O2 environment
| Autor: | Minxu Lu, Wei Liu, Juanjuan Dou, Fei Wu, Xu Chuanchuan, Xueqiang Lin |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Aqueous solution
Materials science Precipitation (chemistry) Scanning electron microscope Metallurgy General Physics and Astronomy Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films Dielectric spectroscopy Corrosion Cr element High pressure Pitting corrosion |
| Zdroj: | Applied Surface Science. 329:104-115 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2014.12.109 |
| Popis: | The development of corrosion scale of 3Cr steel in an aqueous environment containing 95% CO 2 –5% O 2 was characterized and analyzed by scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), X-ray diffraction (XRD) and in situ electrochemical impedance spectroscopy (EIS). The results show that the corrosion of 3Cr steel was promoted by dissolved oxygen. Fe(OH) 3 precipitation formed at local areas, leading to the nonuniform distribution of Cr element and pitting corrosion. With the increase of corrosion time, Cr-rich area formed at the bottom of pits, where the pitting corrosion process was inhibited. The importance of Fe(OH) 3 and Cr-rich area on the formation of corrosion pits and pits development was emphasized. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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