TY - GEN
T1 - Super ODS steels R&D for fuel cladding of next generation nuclear systems
T2 - International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
AU - Lee, J. H.
AU - Kimura, A.
AU - Kasada, R.
AU - Iwata, N.
AU - Kishimoto, H.
AU - Zhang, C. H.
AU - Isselin, J.
AU - Dou, P.
AU - Muthukumar, N.
AU - Okuda, T.
AU - Inoue, M.
AU - Ukai, S.
AU - Ohnuki, S.
AU - Fujisawa, T.
AU - Abe, T. F.
PY - 2009
Y1 - 2009
N2 - Corrosion is a critical issue for cladding materials, especially, in sever corrosion environment as supercritical pressurized water (SCPW). In this work, the effects of alloy elements on the corrosion behavior in SCPW were investigated for a series of oxide dispersion strengthened (ODS) steels to design alloy compositions for corrosion resistant super ODS ferritic steels. Corrosion tests were carried out for the ODS steels with different concentrations of Cr and Al in SCPW at 773K at 25MPa with 8ppm of dissolved oxygen. The corrosion rate of SUS430, which contained 16wt.%Cr, was much higher than 16Cr-ODS steel. This suggests that nano-sized oxide particles dispersion and very fine grains play an important role in suppression of the corrosion. The corrosion of the ODS steel was reduced by an addition of Al in 16wt.%Cr-ODS steel but not in 19Cr-ODS steel. FE-EPMA chemical analysis clearly indicated that the surface of the Al added ODS steels was covered by alumina which suppresses the corrosion in SCPW. It is considered that an adequate combination of the contents of Cr and Al is ranging (14-16)Cr and (3.5-4.5)Al.
AB - Corrosion is a critical issue for cladding materials, especially, in sever corrosion environment as supercritical pressurized water (SCPW). In this work, the effects of alloy elements on the corrosion behavior in SCPW were investigated for a series of oxide dispersion strengthened (ODS) steels to design alloy compositions for corrosion resistant super ODS ferritic steels. Corrosion tests were carried out for the ODS steels with different concentrations of Cr and Al in SCPW at 773K at 25MPa with 8ppm of dissolved oxygen. The corrosion rate of SUS430, which contained 16wt.%Cr, was much higher than 16Cr-ODS steel. This suggests that nano-sized oxide particles dispersion and very fine grains play an important role in suppression of the corrosion. The corrosion of the ODS steel was reduced by an addition of Al in 16wt.%Cr-ODS steel but not in 19Cr-ODS steel. FE-EPMA chemical analysis clearly indicated that the surface of the Al added ODS steels was covered by alumina which suppresses the corrosion in SCPW. It is considered that an adequate combination of the contents of Cr and Al is ranging (14-16)Cr and (3.5-4.5)Al.
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M3 - Conference contribution
AN - SCOPUS:84907923668
T3 - International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
SP - 2216
EP - 2221
BT - International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
PB - Atomic Energy Society of Japan
Y2 - 10 May 2009 through 14 May 2009
ER -