Abstract
The present investigation is concerned with fundamental studies of the mechanisms of pitting corrosion in the Ni-based alloys 602 and 693, following long-term exposure to syngas at 540 °C and a 35-bar total pressure. The 4-years’ plant-exposed alloys were examined using synchrotron X-ray diffraction (XRD) in combination with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is concluded that the pitting corrosion attacks start when carbon diffuses into the bulk of the alloys following the breakdown of the protective Cr2O3-Al2O3 surface oxide layer. During the incubation period, this oxide layer provides an effective barrier against carbon intrusion by virtue of its ability to restore cracks and flaws through diffusion. The corrosion pits then grow by a process of internal carburization and oxidation, in which carbides, oxides, and graphite form separately within an approximately 30-μm-thick belt in front of the pits (referred to as the white zone). In particular, the oxidation of the internal Cr3C2 carbides occurring close to the white zone/pit interface is associated with large volume changes. This volume expansion results in the buildup of high mechanical stresses within the white zone and, eventually, to the complete disintegration of the original alloy matrices into a layered pit microstructure consisting of Ni + Fe and Cr2O3 + Al2O3 + graphite. The observed microstructural changes have been rationalized through detailed modeling of the physical reactions involved, leading to the development of new and comprehensive models for high-temperature pitting corrosion in Ni-based alloys.
Similar content being viewed by others
Notes
JEOL is a trademark of Japan Electron Optics Ltd., Tokyo.
References
R.T. Jones and K.L. Baumert: Corrosion/2001, Paper No. 1372, NACE International, Houston, TX, 2001
H.J. Grabke, R. Krajak, J.C. Nava Paz: Corros. Sci., 1993, vol. 35 (5–8), pp. 1141–50
R.C. Schueler: Hydrocarbon Process., 1972, vol. 51, pp. 73–75
G.Y. Lai: High-Temperature Corrosion of Engineering Alloys, 1st ed., ASM INTERNATIONAL, Materials Park, OH, 1990
J. Pattinson: J. Iron Inst., 1876, vol. 1, pp. 85–100
E.Q. Camp, C. Phillips, L. Gross: Corrosion, 1945, vol. 1 (3), pp. 149–60
H.K. Ihrig: Trans. Electrochem. Soc., 1947, vol. 91, pp. 641–54
F.A. Prange: Corrosion, 1959, vol. 15 (12), pp. 619t–621t
F. Eberle, R.D. Wylie: Corrosion, 1959, vol. 15 (12), pp. 622t–626t
W.B. Hoyt, R.H. Caughey: Corrosion, 1959, vol. 15 (12), pp. 627t–630t
R.F. Hochman, J.H. Burson: Am. Pet. Inst. Div. Refin. Proc., 1966, vol. 46, pp. 331–44
H.J. Grabke, R. Krajak, E.M. Müller-Lorenz: Werkstoffe Korros., 1993, vol. 44, pp. 89–97
E. Pippel, J. Woltersdorf, H.J. Grabke, S. Strauss: Steel Res., 1995, vol. 66 (5), pp. 217–21
D.C. Agarwal, W.R. Herda, U. Brill: Adv. Mater. Processes, 1995, vol. 148 (4), pp. 42–45
M.L. Holland, H.J. De Bruyn: Int. J. Press. Ves. Pip., 1996, vol. 66 (1–3), pp. 125–33
C.M. Chun, T.A. Ramanarayanan, J.D. Mumford: Mater. Corros., 1999, vol. 50, pp. 634–39
B. Schmid: Doctoral Thesis, Norwegian University of Science and Technology, Trondheim, Norway, 2000
B. Schmid, J.C. Walmsley, Ø. Grong, R. Ødegård: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 345–54
B.A. Baker and G.D. Smith: Corrosion/2000, Paper No. 257, NACE International, Houston, TX, 2000
H.J. De Bruyn, E.H. Edwin, and S. Brendryen: Corrosion/2001, Paper No. 1383, NACE International, Houston, TX, 2000
Z. Zeng, K. Natesan, V.A. Maroni: Oxid. Met., 2002, vol. 58 (1–2), pp. 147–70
C.H. Toh: Doctoral Thesis, University of New South Wales, Sydney, 2002
C.H. Toh, P.R. Munroe, D.J. Young: Oxid. Met., 2002, vol. 58 (1–2), pp. 1–21
P. Szakálos, R. Pettersson, S. Hertzman: Corros. Sci., 2002, vol. 44 (10), pp. 2253–70
P. Szakálos: Mater. Corros., 2003, vol. 54 (10), pp. 756–62
A. Schneider, H.J. Grabke: Mater. Corros., 2003, vol. 54 (10), pp. 793–98
F.D. Gabriele, J.R. Bernstein, M.M. Al-Qhatani, Z. Liu, M.P. Jordan, J.A. Richardson, F.H. Stott: Mater. Corros., 2003, vol. 54 (11), pp. 854–59
A.T.W. Kempen, J.C. Wortel: Mater. Corros., 2004, vol. 55 (4), pp. 249–58
Y. Nishiyama, T. Kudo, N. Otsuka: Mater. Trans., 2005, vol. 46 (8), pp. 1890–96
R. Kirchheiner, D.J. Young, P. Becker, and R.N. Durham: Corrosion/2005, Paper No. 5428, NACE International, Houston, TX, 2005
H. Stahl, S. Gyde Thomsen: Ammonia Plant Saf. Relat. Facil., 1996, vol. 36, pp. 180–91
S.B. Parks, C.M. Schillmoller: Stainless Steel World, 1997, vol. 9 (3), pp. 44–49
H.J. De Bruyn, B. Schmid, Ø. Grong, and J.Z. Albertsen: Corrosion/2005, Paper No. 5413, NACE International, Houston, TX
K. Hirotani: Proc. 15th Int. Offshore and Polar Eng. Conf., The International Society of Offshore and Polar Engineers, Seoul, Korea, 2005, pp. 54–61
J.Z. Albertsen: Doctoral Thesis, Norwegian University of Science and Technology, Trondheim, Norway, 2007
H.J. Grabke: Mater. Corros., 2003, vol. 54 (10), pp. 736–46
Y. Nishiyama, N. Otsuka, T. Kudo, and O. Miyahara: Corrosion/2003, Paper No. 3471, NACE International, Houston, TX
I. Koszman: in High Temperature Gas-Metal Reactions in Mixed Environments, A. Jansson, Z.A. Foroulis, eds., AIME, New York, NY, 1973, pp. 155–67
P. Elliott: Corrosion/2000, Paper No. 527, NACE International, Houston, TX, 2000
S.R. Shatynski, H.J. Grabke: Arch. für das Eisenhüttenwesen, 1978, vol. 49 (3), pp. 129–33
H.J. Grabke: Scripta Metall., 1975, vol. 9 (11), pp. 1181–84
H.J. Grabke, A. Schnaas: in Alloy 800, W. Betteridge, ed., Petten, The Netherlands, 1978, pp. 195–211
R. Petkovic-Luton, T.A. Ramanarayanan: Oxid. Met., 1990, vol. 34 (5–6), pp. 381–400
A. Perkins: in Behaviour of High Temperature Alloys in Aggressive Environments, Petten, The Netherlands, 1980, pp. 617–47
X.G. Zheng, D.J. Young: Oxid. Met, 1994, vol. 42 (3–4), pp. 163–90
H.J. Grabke and E.M. Müller-Lorenz: Corrosion/2001, Paper No. 1373, NACE International, Houston, TX, 2001
B. Schmid, Ø. Grong, R. Ødegård: Mater. Corros., 1999, vol. 50 (11), pp. 647–53
O.V.D. Biest, J.M. Harrison, J.F. Norton: Int. Conf. Behaviour of High Temperature Alloys in Aggressive Environments, I. Kirman, ed., The Metals Society, London, 1979, pp. 681–703
M. Hänsel, C.A. Boddington, D.J. Young: Corros. Sci., 2003, vol. 45, pp. 967–81
Y. Nishiyama, N. Otsuka, T. Kudo: Corros. Sci., 2006, vol. 48 (8), pp. 2064–83
R.A. Perkins, W. Coons, D.J. Radd: in Properties of High Temperature Alloys, With Emphasis on Environmental Effects, The Electrochemical Society, Princeton, NJ, 1976, pp. 733–49
P. Szakálos: Doctoral Thesis, Royal Institute of Technology, Stockholm, 2004
J.Z. Albertsen, Ø. Grong, R.H. Mathiesen, B. Schmid: Corros. Eng., Sci. Technol., 2005, vol. 40 (3), pp. 239–43
M.J. Donachie, S.J. Donachie: Superalloys—A Technical Guide, 2nd ed., ASM INTERNATIONAL, Materials Park, OH, 2002
J. Wilson and D.C. Agarwal: Corrosion/2005, Paper No. 5423, NACE International, Houston, TX, 2005
B.A. Baker, G.D. Smith, V.W. Hartmann, L.E. Shoemaker, and S.A. McCoy: Corrosion/2002, Paper No. 2394, NACE International, Houston, TX, 2002
ESRF: www.esrf.fr/exp_facilities/BM1A/index.htm, 2005
L.A. Giannuzzi, F.A. Stevie: Micron, 1999, vol. 30 (3), pp. 197–204
R. Kilaas: MacTempas, 1992
P. Villars, L.D. Calvert, W.B. Pearson: Pearson’s Handbook of Crystallographic Data for Intermetallic Phases, 1st ed., ASM INTERNATIONAL, Metals Park, OH, 1985
FactSage: www.factsage.com, 2005
CRCT-ThermFact-Inc, GTT-Technologies: FACT 53. Compound Database, 2005
J. Cranck: The Mathematics of Diffusion, 2nd ed., Clarenden Press, Oxford, United Kingdom, 1975
P.G. Shewmon: Diffusion in Solids, 1st ed., McGraw-Hill Book Company, New York, NY, 1963
C. Wagner: Z. Elektrochem., 1959, vol. 63, pp. 772–82
U. Krupp, H.J. Christ: J. Phase Equilib. Diffus., 2005, vol. 26 (5), pp. 487–93
R.F. Hochman: Proc. 3rd Int. Cong. Metallic Corrosion, University of Moscow Press, Moscow, 1969, pp. 119–33
R.G. Olsson, E.T. Turkdogan: Metall. Trans., 1974, vol. 5, pp. 21–26
G.A. Jablonski, A. Geurts, J. Sacco, R.R. Biederman: Carbon, 1992, vol. 30 (1), pp. 87–98
H.J. Grabke: Corrosion, 1995, vol. 51 (9), pp. 711–20
R. Yin: Oxid. Met., 2003, vol. 60 (1–2), pp. 103–116
Q. Wei, E. Pippel, J. Woltersdorf, H.J. Grabke: Mater. Corros., 1999, vol. 50 (11), pp. 628–33
J.C. Nava Paz, H.J. Grabke: Oxid. Met., 1993, vol. 39 (5–6), pp. 437–56
E. Pippel, J. Woltersdorf, R. Schneider: Mater. Corros., 1998, vol. 49 (5), pp. 309–16
J.L. Meijering: in Advances in Materials Research, H. Herman, ed., Wiley-Interscience Publishers, New York, NY, 1971, pp. 1–81
J.P. Neumann, T. Zhong, Y.A. Chang: Bull. Alloy Phase Diagr., 1984, vol. 5 (2), pp. 141–43
A. Engström: Doctoral Thesis, Royal Institute of Technology, Stockholm, 1996
T. Rosenqvist: Principles of Extractive Metallurgy, 2nd ed., McGraw-Hill International Book Company, Singapore, 1983
D.R. Askeland: The Science and Engineering of Materials, 3rd ed., Stanley Thornes Publishers, Ltd., Cheltenham, 1998
Z. Zeng, K. Natesan: Chem. Mater., 2005, vol. 17 (14), pp. 3794–3801
R. Schneider, E. Pippel, J. Woltersdorf, S. Strauss, H.J. Grabke: Steel Res., 1997, vol. 68 (7), pp. 326–32
P. Szakálos, M. Lundberg, R. Pettersson: Corros. Sci., 2006, vol. 48 (7), pp. 1679–95
G. Aylward, T. Findlay: SI Chemical Data, 3rd ed., John Wiley & Sons, Brisbane, 1994
Acknowledgments
The authors acknowledge the financial support provided by the Norwegian Research Council and Statoil ASA through the ThermoTech and ANSY projects. The authors also acknowledge the SNBL, and, in particular, beam line director Hans P. Weber, for the allocation of in-house beam time to this project. The authors are also grateful to Mr. Kåre Johansson at Statoil Tjeldbergodden (Norway) for providing the plant-exposed materials and to Dr. Peter Heard at Bristol University (Bristol, United Kingdom) for preparing the FIB samples.
Author information
Authors and Affiliations
Corresponding author
Additional information
Manuscript submitted December 14, 2006.
Appendix
Appendix
Rights and permissions
About this article
Cite this article
Albertsen, J., Grong, Ø., Walmsley, J. et al. A Model for High-Temperature Pitting Corrosion in Nickel-Based Alloys Involving Internal Precipitation of Carbides, Oxides, and Graphite. Metall Mater Trans A 39, 1258–1276 (2008). https://doi.org/10.1007/s11661-008-9494-5
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11661-008-9494-5