Abstract
Alloys and coatings used in high temperature applications are often subject to surface degradation influenced by the presence of deposits. Typical examples are fireside corrosion in coal-fired boilers and hot corrosion of blades and vanes in the hot sections of gas turbines. Depending on the source, deposit compositions may occur in a wide range from primarily sulfate to primarily oxide and various combinations of the two. There does not seem to be evidence of severe corrosion caused by gaseous Na2SO4. Generally, severe corrosion occurs when the deposits are liquid. However, significant corrosion has been observed in some cases with deposits, which are nominally solid. Corrosion is often caused by liquid deposits, in which negative oxide solubility gradients for alloy components are established across the deposits by rapid interface reactions. Hot corrosion can occur at temperatures near 700 °C by a variety of mechanisms if a phase which allows rapid transport is formed. This includes compounds such as Na2MoO4 (even in atmospheres without SO3), MSO4–Na2SO4 solutions or metastable nanostructured phases. Calling all corrosion in this temperature regime “Type II” can be misleading with regard to mechanism. There are similarities in the underlying mechanisms of some forms of hot corrosion in the 700 °C range and fireside corrosion in that they involve synergistic fluxing. The corrosive species responsible for fireside corrosion of ferrous alloys is a liquid (Na,K)2SO4–Fe2(SO4)3 solution and not alkali iron trisulfate. The propagation mechanism involves a synergistic dissolution process of protective Cr2O3 and Fe2O3. Terms such as “Type I,” “Type II” and “gas-phase-induced acidic fluxing” should be used with care in describing mechanisms of deposit-induced corrosion.
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References
W. T. Reid, External Corrosion and Deposits Boilers and Gas Turbines, (American Elsevier Publishing Company Inc., New York, 1971).
J. Stringer, Annual Review of Material Science 7, 1977 (477–509).
I. G. Wright and S. C. Kung, Materials at High Temperatures 35, 2018 (316).
F. S. Pettit, Oxidation of Metals 76, 2011 (1).
N. L. Ndamka, R. G. Wellman and J. R. Nicholls, Materials at High Temperatures 33, 2016 (44).
G. P. Huffman and F. E. Huggins, Reactions and Transformations of Coal Mineral Matter at Elevated Temperatures. US Steel Corporation Technical Center, Monroeville, PA. The American Chemical Society, Vol. 188. No. 1155, 1984.
J. G. Tschinkel, Corrosion 28, 1972 (161).
N. S. Bornstein, JOM 48, 1996 (37).
N. S. Bornstein, Materials Science Forum 251–254, 1997 (127).
J. Smeggil and J. G. Smeggil, Hot Corrosion of Turbine Materials in the Presence of Mixed Sulfates, (ONR Final Technical Report, UTRC, East Hartford, CT, 2000).
M. P. Borom, C. A. Johnson and L. A. Peluso, Surface and Coatings Technology 86–87, 1996 (116).
K.-Y. Jung, Ph. D Thesis, University of Pittsburgh, 2009.
W. Braue, The Journal of Materials Science 44, 2009 (1164–1675).
W. Braue, P. Mechnich and P. W. M. Peters, Materials at High Temperatures 28, 2011 (315).
W. Braue and P. Mechnich, Journal of the American Ceramic Society 94, 2011 (4483).
N. Bohna, Ph. D Thesis, Univ. of Pittsburgh, 2015.
V. Tolpygo, Oxidation of Metals 88, 2017 (87).
B. S. Lutz, R. W. Jackson, N. M. Abdul-Jabbar, V. Tolpygo and C. G. Levi, Oxidation of Metals 88, 2017 (73).
D. A. Shifler, Materials at High Temperatures 35, 2018 (225).
P. Hancock, Materials Science and Technology 3, 1987 (536).
S. Pahlavanyali, H. T. Pang, F. Li, S. Bagnali and C. Rae, Materials Science and Technology 30, 2014 (1890).
M. A. DeCrescente and N. S. Bornstein, Corrosion 24, 1968 (127).
P. Knutsson, H. Lai and K. Stiller, Corrosion Science 73, 2013 (230).
M. G. Lawson, F. S. Pettit and J. R. Blachere, Journal of Materials Research 8, 1993 (1964).
A. Rahmel, W. Jaeger and Z. Anorg, Chem. 303, 1960 (90).
K. L. Luthra, Metallurgical Transactions A 13A, 1982 (1647).
K. T. Chiang, G. H. Meier and R. A. Perkins, Journal of Materials for Energy Systems 6, 1984 (71).
N. Birks, G. H. Meier and F. S. Pettit, Introduction to the High Temperature Oxidation of Metals, (Cambridge University Press, Cambridge, 2006).
R. A. Rapp, Corrosion 42, 1986 (568).
R. A. Rapp and K. S. Goto, in Molten Salts, eds. J. Braunstein and J. R. Selman (Electrochemical Society, Pennington, 1981), p. 81.
N. Otsuka and R. A. Rapp, Journal of Electrochemical Society 137, 1990 (46).
Y. S. Hwang and R. A. Rapp, Journal of Electrochemical Society 137, (4), 1990 (1276).
L. Longa-Nava, Y. S. Zhang, M. Takemoto and R. A. Rapp, Corrosion Science 52, 1996 (680).
B. S. Lutz, J. M. Alvarado-Orozco, L. Garcia-Fresnillo and G. H. Meier, Oxidation of Metals 88, 2017 (599).
K. L. Luthra, in High Temperature Corrosion, ed. R. A. Rapp (NACE Houston 1983), p. 507.
K. L. Luthra, Metallurgical and Materials Transactions A 13A, 1982 (1843).
K. L. Luthra, Metallurgical and Materials Transactions A 13A, 1982 (1853).
J. M. Alvarado-Orozco, J. E. Garcia-Herrera, B. Gleeson, F. S. Pettit and G. H. Meier, Oxidation of Metals 90, 2018 (527).
J. E. Garcia-Herrera, L. Garcia-Fresnillo and G. H. Meier, Univ. of Pittsburgh (unpublished research).
W.-J. Zhang and R. Sharghi-Moshtaghin, Metallurgical and Materials Transactions A 49A, 2018 (4362).
E. Kistler, W. T. Chen, G. H. Meier and B. Gleeson, Materials and Corrosion 70, 2019 (1346).
K. Y. Jung, F. S. Pettit and G. H. Meier, Materials Science Forum 595–598, 2008 (805).
T. Gheno, G. H. Meier and B. Gleeson, Oxidation of Metals 84, 2015 (185).
P. T. Brennan, Ph. D Thesis, Univ. of Pittsburgh, 2015.
B. S. Lutz, G. R. Holcomb and G. H. Meier, Oxidation of Metals 84, 2015 (353).
I. G. Wright and J. P. Shingledecker, Materials at High Temprature 32, 2015 (426).
Acknowledgements
The author gratefully acknowledges the contributions of many students and postdocs and collaboration over the years with his University colleague, Fred Pettit, who provided a wealth of knowledge of hot corrosion, and his late colleague, Roger Perkins, who provided his insight and cleverness in experimental design. Prof. Brian Gleeson is acknowledged for many helpful comments on the manuscript. Much of the work described was supported by the Office of Naval Research, most recently, under ONR Contract N00014-10-1-0661, David A. Shifler, Scientific Monitor.
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Meier, G.H. Invited Review Paper in Commemoration of Over 50 Years of Oxidation of Metals: Current Aspects of Deposit-Induced Corrosion. Oxid Met 98, 1–41 (2022). https://doi.org/10.1007/s11085-020-10015-6
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DOI: https://doi.org/10.1007/s11085-020-10015-6