The oxidation tests of the Nimonic 263 alloy exposed to deaerated supercritical water at 600-700°C under 25 MPa were carried out for up to 1000 h. Oxidation rate increased with an increase in temperature. The microstructure and phase composition of oxide scale were analysed by scanning electron microscopy/energy dispersive X-ray spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. It can be seen that a complex oxide structure formed on the surface of Nimonic 263 including an outer layer of Ni–Fe/Ni–Cr spinel oxide, Ni/Co hydroxide and TiO2 and an inner layer of a mixture of NiCr2O4 and Cr2O3 while the innermost layer is made up of Cr2O3. The MoO3 can be observed at 600°C but disappeared with the increasing temperature. The growth mechanism of oxide scale was discussed.
MaileK.Qualification of Ni-based alloys for advanced ultra supercritical plants. Procedia Eng. 2013; 55: 214–220. doi: 10.1016/j.proeng.2013.03.245
2.
EnglandDMVirkarAV.Oxidation kinetics of some nickel-based superalloy foils and electronic resistance of the oxide scale formed in air part i. J Electrochem Soc. 1999; 146: 3196–3202. doi: 10.1149/1.1392454
3.
ZhangQTangRYinKCorrosion behavior of Hastelloy C-276 in supercritical water. Corros Sci. 2009; 51 (9): 2092–2097. doi: 10.1016/j.corsci.2009.05.041
4.
TanLRenXSridharanKCorrosion behavior of Ni-base alloys for advanced high temperature water-cooled nuclear plants. Corros Sci. 2008; 50 (11): 3056–3062. doi: 10.1016/j.corsci.2008.08.024
5.
ChangKHChenSMYehTKEffect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700°C. Corros Sci. 2014; 81: 21–26. doi: 10.1016/j.corsci.2013.11.034
6.
RodriguezDMerwinAKarmiolZSurface chemistry and corrosion behavior of Inconel 625 and 718 in subcritical, supercritical, and ultrasupercritical water. Appl Surf Sci. 2017; 404: 443–451. doi: 10.1016/j.apsusc.2017.01.119
7.
BehnamianYMostafaeiAKohandehghanAA comparative study of oxide scales grown on stainless steel and nickel-based superalloys in ultra-high temperature supercritical water at 800°C. Corros Sci. 2016; 106: 188–207. doi: 10.1016/j.corsci.2016.02.004
8.
KimDSahILeeHJHydrogen effects on oxidation behaviors of Haynes 230 in high temperature steam environments. Solid State Ionics. 2013; 243: 1–7. doi: 10.1016/j.ssi.2013.04.010
9.
GormanDMHigginsonRLDuHMicrostructural analysis of IN617 and IN625 oxidised in the presence of steam for use in ultra-supercritical power plant. Oxid Met. 2013; 79 (5-6): 553–566. doi: 10.1007/s11085-012-9342-2
10.
TanLAllenTRYangY.Corrosion behavior of alloy 800H (Fe–21Cr–32Ni) in supercritical water. Corros Sci. 2011; 53 (2): 703–711. doi: 10.1016/j.corsci.2010.10.021
11.
KimDKimDLeeHJCorrosion characteristics of Ni-base superalloys in high temperature steam with and without hydrogen. J Nucl Mater. 2013; 441 (1): 612–622. doi: 10.1016/j.jnucmat.2013.04.023
12.
McIntyreNSRummeryTECookMGX-Ray photoelectron spectroscopic study of the aqueous oxidation of monel-400. J Electrochem Soc. 1976; 123: 1164–1170. doi: 10.1149/1.2133027
13.
HuangJWuXHanEH.Electrochemical properties and growth mechanism of passive films on alloy 690 in high-temperature alkaline environments. Corros Sci. 2010; 52 (10): 3444–3452. doi: 10.1016/j.corsci.2010.06.016
14.
LengletMd'HuysserAArsèneJXanes, X-ray photo-electron and optical spectra of divalent nickel at the crystallographic transition in NiCr2O4 and the Ni1-xCuxCr2O4 system: correlation with the Jahn-Teller effect. J Phys C Solid State Phys.1986; 19 (17): L363–L368. doi: 10.1088/0022-3719/19/17/003
15.
MachetAGaltayriesAMarcusPXPS study of oxides formed on nickel-base alloys in high-temperature and high-pressure water. Surf Interface Anal. 2002; 34 (1): 197–200. doi: 10.1002/sia.1282
16.
WangYLiuYTangHOxidation behaviors of porous Haynes 214 alloy at high temperatures. Mater Charact. 2015; 107: 283–292. doi: 10.1016/j.matchar.2015.07.026
17.
ReddyBMKhanAYamadaYStructural characterization of CeO2-TiO2 and V2O5/CeO2-TiO2 catalysts by Raman and XPS techniques. J Phys Chem B. 2003; 107 (22): 5162–5167. doi: 10.1021/jp0344601
18.
BiesingerMCLauLWMGersonARResolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Sc, Ti, V, Cu and Zn. Appl Surf Sci. 2010; 257 (3): 887–898. doi: 10.1016/j.apsusc.2010.07.086
19.
XueTWangXLeeJM.Dual-template synthesis of Co(OH)2 with mesoporous nanowire structure and its application in supercapacitor. J Power Sources. 2012; 201: 382–386. doi: 10.1016/j.jpowsour.2011.10.138
20.
FengSYangWWangZ.Synthesis of porous NiFe2O4 microparticles and its catalytic properties for methane combustion. Mater Sci Eng: B. 2011; 176 (18): 1509–1512. doi: 10.1016/j.mseb.2011.09.007
21.
GrünertWStakheevAYFeldhausRAnalysis of molybdenum (3d) XPS spectra of supported molybdenum catalysts: an alternative approach. J Phys Chem. 1991; 95 (3): 1323–1328. doi: 10.1021/j100156a054
22.
MachetAGaltayriesAZannaSXps and STM study of the growth and structure of passive films in high temperature water on a nickel-base alloy. Electrochim Acta. 2004; 49: 3957–3964. doi: 10.1016/j.electacta.2004.04.032
23.
ZhongXHanEHWuX.Corrosion behavior of alloy 690 in aerated supercritical water. Corros Sci. 2013; 66: 369–379. doi: 10.1016/j.corsci.2012.10.001
24.
SunHWuXHanEH.Effects of temperature on the protective property, structure and composition of the oxide film on Alloy 625. Corros Sci. 2009; 51: 2565–2572. doi: 10.1016/j.corsci.2009.06.043
SunMWuXZhangZAnalyses of oxide films grown on alloy 625 in oxidizing supercritical water. J. Supercrit. Fluid. 2008; 47: 309–317. doi: 10.1016/j.supflu.2008.07.010
27.
HeplerLGWoolleyEMHurkotDG.Ionization constants for water in aqueous organic mixtures. J Phys Chem. 1970; 74 (22): 3908–3913. doi: 10.1021/j100716a011
28.
SennourMMarchettiLMartinFA detailed TEM and SEM study of Ni-base alloys oxide scales formed in primary conditions of pressurized water reactor. J Nucl Mater. 2010; 402: 147–156. doi: 10.1016/j.jnucmat.2010.05.010
29.
DieckmannRMasonTOHodgeJDDefects and cation diffusion in magnetite (III.) tracerdiffusion of foreign tracer cations as a function of temperature and oxygen potential. Ber Bunsen Phys Chem. 1978; 82: 778–783. doi: 10.1002/bbpc.19780820803
30.
ZhangNQZhuZLXuHOxidation of ferritic and ferritic–martensitic steels in flowing and static supercritical water. Corros Sci. 2016; 103: 124–131. doi: 10.1016/j.corsci.2015.10.017
31.
StellwagB.The mechanism of oxide film formation on austenitic stainless steels in high temperature water. Corros Sci. 1998; 40: 337–370. doi: 10.1016/S0010-938X(97)00140-6
32.
HaugsrudR.On the high-temperature oxidation of nickel. Corros Sci. 2003; 45 (1): 211–235. doi: 10.1016/S0010-938X(02)00085-9
33.
SabioniACSHuntzAMPhilibertJRelation between the oxidation growth rate of chromia scales and self-diffusion in Cr2O3. J Mater Sci. 1992; 27 (17): 4782–4790. doi: 10.1007/BF01166020
