Metal Dusting and Oxidation at 593 and 704°C

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Experiments involving metal dusting in carbonaceous atmosphere and oxidation in air have been carried out at 593 and 704oC using T22, T91 and 800 alloy steels. The effect of Cr on these two processes can be understood because of their compositions. In general, the resistance to both metal dusting up to 1000 hours and oxidation up to 456 hours has been found to improve with increase in Cr content from 2.36 to 21.6%. However, mechanisms change from spalling to oxide scale in oxidation and from uniform metal dusting to pitting in metal dusting as the amount of Cr increases in these steels. Pitting corrosion shows higher C carbon concentration in the pits than at locations away from the pits. A detailed analysis has been performed to evaluate the scale and spalled materials in terms of oxide characterization using XRD, AES, SEM, EDS on SEM, optical microscopy and TEM.

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Periodical:

Materials Science Forum (Volumes 539-543)

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Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

4226-4231

Citation:

S.K. Varma et al., "Metal Dusting and Oxidation at 593 and 704°C", Materials Science Forum, Vols. 539-543, pp. 4226-4231, 2007

Online since:

March 2007

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$38.00

[1] R.F. Hochman and J.H. Burson, in: Proceedings of API Division of Refining, vol. 46 (1966), p.331.

[2] R.F. Hochman, in: Proceedings of the 4 th International Congress on Metallic Corrosion, edited by N.E. Hammer, National Association of Corrosion Engineers, Houston, TX (1972), p.258.

[3] R.F. Hochman, in: Proceedings of the Symosium on Properties of High Temperature Alloys with Emphasis on Environmental Effects, edited by Z.A. Foroulis and F.S. Pettit, The Electrochemical Chemical Society, vol. 54 (1977), p.799.

[4] Z. Zeng and K. Natesan, Chemistry of Materials, vol. 17 (2005), p.3794.

[5] Z. Zeng and K. Natesan, Solid State Ionics, vol. 167 (2004), p.9.

[6] Z. Zeng, K. Natesan, and M. Grimsditch, Corrosion, vol. 60 (2004), p.632.

[7] Z. Zeng and K. Natesan, Chemistry of Materials, vol. 15 (2003), p.872.

[8] Z. Zeng and K. Natesan, in: Materials Research Society Symposium Proceedings, vol. 756 (2003), p.557.

[9] Z. Zeng, K. Natesan, and V.A. Maroni, Oxidation of Metals, vol. 58 (2002), p.147.

[10] Aditya Putrevu, Zuato Zeng, Ken Natesan, S.K. Varma, and W.G. Durrer, in: Ferrous Physical Metallurgy of Highly Alloyed Steels, edited by James P. Materkowsky, Materials Science and Technology '05, (2005).

[11] Je M. Oh, in: 1986 Report of Investigation, Report Number RI 9047 Bureau of Mines, United States Department of the Interior, (1986), pp.1-12.

[12] J.S. Dunning, in: 1984 Report of Investigation, Report Number RI 8856 Bureau of Mines, United States Department of the Interior, (1984), pp.1-15.

[13] Zs. Tokei, H. Viefhaus, and H.J. Grabke, Applied Surface Science, vol. 165 (2000), pp.23-33.