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Characteristics of CO 2 corrosion scale formed on P110 steel in simulant solution with saturated CO 2
Author(s) -
Yin Zhifu,
Zhao Wenzhen,
Bai Zhenquan,
Feng Yaorong
Publication year - 2008
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2867
Subject(s) - corrosion , microstructure , carbonate , carbon steel , materials science , carbon dioxide , metallurgy , x ray photoelectron spectroscopy , chemical engineering , chemistry , organic chemistry , engineering
Abstract The SEM, X‐ray diffraction (XRD), and XPS were employed to systematically characterize the component and microstructure of the corrosion scale formed on P110 steel exposed to carbon dioxide (CO 2 ) environment. A loose and porous microstructure in corrosion scale was observed under turbulent flow condition for 120 h at 100 °C with a carbon dioxide partial pressure of 4 MPa in which the principal component was iron carbonate (FeCO 3 ), whereas at 160 °C the corrosion scale was composed mainly of FeCO 3 and a little amount of FeO(OH). In addition, complex carbonate (Mg,Fe)CO 3 was produced because some Fe positions in FeCO 3 lattice were substituted by Mg. It showed that a double‐layer structure of corrosion scale was observed at 160 °C compared with the result at 100 °C. Copyright © 2008 John Wiley & Sons, Ltd.