Share This Article:

High Temperature Corrosion Behaviour of T-91 and T-22 Bare Steel in 75wt.%Na2SO4+25wt.%NaCl Molten Salt Environment at 900°C

Full-Text HTML Download Download as PDF (Size:910KB) PP. 593-606
DOI: 10.4236/jmmce.2010.97042    3,125 Downloads   4,295 Views   Citations


The oxidation behaviour of T-91 steel and T-22 steel in salt of 75wt.% Na2SO4+25wt.% NaCl has been studied under isothermal conditions at a temperature of 900°C in a cyclic manner. Oxidation kinetics was established for the T-91 steel and T-22 steel in salt at 900°C under cyclic conditions for 50 cycles by thermogravimetric technique. Each cycle consisted of 1 hour heating at 900°C followed by 20 min of cooling in air. Both the samples nearly followed the parabolic rate law of oxidation. X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray (SEM/EDAX) techniques were used to characterise the oxide scales. T-91 steel was found to be more corrosion resistant than T-22 steel under salt oxidation.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

D. Gond, V. Chawla, D. Puri and S. Prakash, "High Temperature Corrosion Behaviour of T-91 and T-22 Bare Steel in 75wt.%Na2SO4+25wt.%NaCl Molten Salt Environment at 900°C," Journal of Minerals and Materials Characterization and Engineering, Vol. 9 No. 7, 2010, pp. 593-606. doi: 10.4236/jmmce.2010.97042.


[1] Harpreet Singh, D. Puri, S. Prakash, Some studies on hot corrosion performance of plasma sprayed coatings on a Fe-based superalloy, Surface & Coatings Technology 192, 25 May 2004,pp.27– 38.
[2] R.J. Link, N. Birks, F.S. Pettit, F. Dethorey, The response of alloys to erosion– corrosion at high temperatures, Oxid. Met. 49 (3–4) (1998) pp.213–236.
[3] I. Saeki, T. Saito, R. Furuichi, M. Itoh, Growth process of protective oxides formed on type 304 and 430 stainless steels at 1273°K, Corros. Sci. 40 (8) (1998) p.1295.
[4] S. Jianian, Z. Longjiang, L. Tiefan, High temperature oxidation of Fe–Cr alloys in wet oxygen, Oxid. Met. 48 (3, 4) (1997) p.347.
[5] Z. Tokei, H. Viefhaus, H.J. Grabke, Initial stages of oxidation of a 9CrMoV steel: role of segregation and martensite laths, Appl. Surf. Sci. 165 (1) (2000) p.23.
[6] A. P. Greeff, C.W. Louw, H.C. Swart, The oxidation of industrial FeCrMo steel, Corros. Sci. 42 (10) (2000) p.1725.
[7] A. Arztegui, T. Gomez-Acebo, F. Castro, Steam oxidation of ferritic steels: kinetics and microstructure, Bol. Soc. Esp. Ceram. Vidr. 39 (3) (2000). p.305.
[8] A.S. Khanna, P. Rodriguez, J.B. Gananamoorthy, Oxidation kinetics, breakaway oxidation, and inversion phenomenon in 9Cr–1Mo steels, Oxid. Met. 26 (3, 4) (1986) p.171.
[9] Mathew MD, Choudhary BK, Albert SK. Selection of materials for PFBR nuclear steam supply system components. Report-PFBR/MDG/2002/001, IGCAR Kalpakkam.
[10] Baldev Raj, B.K. Choudhary, R.K. Singh Raman, Pressure Vessels and Piping 81 (2004) 521– 534.
[11] Kimura K, Kushima H, Abe F, Yagi K, Irie H. In: Strang A, Banks WM, Conroy RD, Goulette MJ, editors. Advances in turbine materials, design and manufacturing. London: The Institute of Materials; 1997. pp. 257–69.
[12] X. Wu, D. Weng, Z. Chen, L. Xu, Surface Coating Technology, 140 (2001), p.231.
[13] P. Niranatlumpong, C.B. Ponton, H.E. Evans, Oxid. Met, 53 (3–4) (2000), pp. 241- 258.
[14] Buta Singh Sidhu, S. Prakash , Performance of NiCrAlY, Ni–Cr, Stellite-6 and Ni3Al coatings in Na2SO4–60% V2O5 environment at 900°C under cyclic conditions, Surface & Coatings Technology 201,17 April 2006, pp.1643–1654.
[15] S. Danyluk, J.Y. Park, Corrosion 35 (12) (1979) p.575.
[16] D. Wang, Surf. Coat. Technol. 36 (1988) p.49.
[17] S.E. Sadique, A.H. Mollah, M.S. Islam, M.M. Ali, M.H.H. Megat, S.Basri, Oxid. Met. 54 (5–6), (2000) p.385.
[18] H. Choi, B. Yoon, H. Kim, C. Lee, Surf. Coat. Technol. 150 (2–3) (2002) pp.297–308.

comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.