High-Temperature Corrosion of Aluminized Diffusion-Coating for Fe-Base Alloy in N2/H2O/H2S-Mixed Gas

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The pack-cementation is one of economical, efficient coating processes for Fe-base alloys. It can provide good protection against high-temperature oxidation and corrosion. In this study, the high-temperature corrosion behavior of the aluminized diffusion-coating on low-carbon T20 steel (Fe-2.0Cr-0.5Mo-0.8Mn-0.3S in at.%) was studied at 800 °C in N2/H2O/H2S-mixed gas. The aluminized coating consisted of Fe3Al. The aluminized T20 steel after corrosion at 800 °C for 10~100h in N2/H2O/H2S-mixed gases, the scale formed on the Fe3Al coating consisted primarily of α-Al2O3, Al2S3, FeAl2O4 and FeO, with relatively slow scaling rates. The Fe3Al intermetallics has reasonable corrosion-and oxidation-resistance, because it can form a protective alumina scale. Without the aluminized diffusion-coating, T20 steel corroded fast with serious scale failure. At the surface, coarse FeS grains with cracks formed. Since FeS has a very high concentration of cation vacancies, it grew fast through the outward diffusion of Fe2+ ions.

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Periodical:

Edited by:

Prof. Ramesh K. Agarwal

Pages:

37-40

DOI:

10.4028/www.scientific.net/NHC.16.37

Citation:

M. J. Kim and D. B. Lee, "High-Temperature Corrosion of Aluminized Diffusion-Coating for Fe-Base Alloy in N2/H2O/H2S-Mixed Gas", Nano Hybrids and Composites, Vol. 16, pp. 37-40, 2017

Online since:

June 2017

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$38.00

* - Corresponding Author

[1] C. Suryanarayana, A. Inoue, Int. Mater. Rev. 58, 131 (2013).

[2] W. M. Yang, H. S. Liu, Y. C. Zhao, A. Inoue, K. M. Jiang, J. T. Huo, H. B. Ling, Q. Li, B. L. Shen, Sci. Rep. 4, 6233 (2014).

[3] L. H. Chiu, C. F. Yang, W. C. Hsieh, A. S. Cheng, Surf. Coat. Technol. 154, 282 (2002).

[4] J. Lin, W. D. Sproul, J. J. Moore, S. Lee, S. Myers, Surf. Coat. Technol. 205, 3226 (2011).

[5] X. J. Lu, Z. D. Xiang, Surf. Coat. Technol. in press, (2016).

[6] T. L. Hu, H. L. Huang, D. Gan, T. Y. Lee, Surf. Coat. Technol. 201, 3502 (2006).

[7] N. J. Simms, J. F. Norton, T. M. Lowe, J. Phys. IV 3, 807 (1993).

[8] N. Birks and G. H. Meier, Introduction to High Temperature Oxidation of Metals, p.72, Edward Arnold, UK (1983).

[9] A. Agüero, E. M. Gutman, V. González, Mater. High Temp. 25, 257 (2008).

[10] J. C. Lee, M. J. Kim, D. B. Lee, Oxid. Met. 81, 617 (2014).

[11] D. J. Young, High Temperature Oxidation and Corrosion of Metals, Elsevier, UK (2008).

[12] J. Shen, L. Zhou, T. Li, Oxid. Met. 48, 347 (1997).

[13] M. Danielewski, S. Mrowec, A. Stołosa, Oxid. Met. 17, 77 (1982).

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