Skip to main content
placeholder image

Corrosion behavior of an Al added high-Cr ODS steel in supercritical water at 600�����C

Journal Article


Abstract


  • Corrosion behavior in the supercritical water (SCW) of an Al added high-Cr oxide dispersion strengthened (ODS) steel was investigated in this study. The steel was exposed to SCW at 600 ��C and 25 MPa for various exposure times up to 1000 h, and the resultant oxide layers were characterized by using weight change measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopies (XPS), scanning/transmission electron microscopy (SEM/TEM), and energy dispersive spectroscopy (EDS). The weight gain after exposure for 1000 h was 6.24 mg/dm 2 , indicating the superior corrosion resistance of 16Cr-3Al ODS steel to SCW. Chemical analysis of the surface oxides showed that the content of Cr-rich oxides increased with the increase of exposure time in SCW. Cross-sectional observation of the oxide scales revealed that an outer layer composed of (Cr, Fe) 2 O 3 and an inner layer composed of Al 2 O 3 formed on the sample surface. The growth of both outer and inner oxide layers followed the parabolic law with the increase of exposure times. The corrosion mechanism was discussed in detail based on the microstructure evolution process with exposure time in SCW.

Publication Date


  • 2019

Citation


  • Ren, J., Yu, L., Liu, Y., Ma, Z., Liu, C., Li, H., & Wu, J. (2019). Corrosion behavior of an Al added high-Cr ODS steel in supercritical water at 600�����C. Applied Surface Science, 480, 969-978. doi:10.1016/j.apsusc.2019.03.019

Scopus Eid


  • 2-s2.0-85062712584

Start Page


  • 969

End Page


  • 978

Volume


  • 480

Issue


Place Of Publication


Abstract


  • Corrosion behavior in the supercritical water (SCW) of an Al added high-Cr oxide dispersion strengthened (ODS) steel was investigated in this study. The steel was exposed to SCW at 600 ��C and 25 MPa for various exposure times up to 1000 h, and the resultant oxide layers were characterized by using weight change measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopies (XPS), scanning/transmission electron microscopy (SEM/TEM), and energy dispersive spectroscopy (EDS). The weight gain after exposure for 1000 h was 6.24 mg/dm 2 , indicating the superior corrosion resistance of 16Cr-3Al ODS steel to SCW. Chemical analysis of the surface oxides showed that the content of Cr-rich oxides increased with the increase of exposure time in SCW. Cross-sectional observation of the oxide scales revealed that an outer layer composed of (Cr, Fe) 2 O 3 and an inner layer composed of Al 2 O 3 formed on the sample surface. The growth of both outer and inner oxide layers followed the parabolic law with the increase of exposure times. The corrosion mechanism was discussed in detail based on the microstructure evolution process with exposure time in SCW.

Publication Date


  • 2019

Citation


  • Ren, J., Yu, L., Liu, Y., Ma, Z., Liu, C., Li, H., & Wu, J. (2019). Corrosion behavior of an Al added high-Cr ODS steel in supercritical water at 600�����C. Applied Surface Science, 480, 969-978. doi:10.1016/j.apsusc.2019.03.019

Scopus Eid


  • 2-s2.0-85062712584

Start Page


  • 969

End Page


  • 978

Volume


  • 480

Issue


Place Of Publication