期刊
CORROSION SCIENCE
卷 100, 期 -, 页码 404-420出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.08.016
关键词
Steel; EIS; SEM; XPS; Acid corrosion
资金
- Beijing Natural Science Foundation Major Project [2131004]
- National Natural Science Foundation of China [51271024]
The comparison of corrosion mechanism of X70 steel, as well as the formation mechanism of scale, at between 9.5 and 1 MPa were studied. The outer FeCO3 scale formed at 1 MPa presented better protectiveness than that at 9.5 MPa, while the protectiveness of inner layer was just contrary. Under supercritical CO2 condition, localized corrosion occurred at the transitional stage-the amorphous layer evolved into inner FeCO3 scale. General corrosion rate decreased in a logarithm tendency with the Young's modulus of FeCO3 scale. The fracture toughness of scale at 9.5 MPa was higher than at 1 MPa. (C) 2015 Elsevier Ltd. All rights reserved.
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