Performance of Nanostructured Metal Nitride Coated T-22 Boiler Steel in Na₂SO₄–60% V₂O₅ Environment at 900°C under Cyclic Conditions

Vikas Chawla, Amita Chawla, D. Puri, S. Prakash, Buta Singh Sidhu

Chemistry Department, Govt. Brijindra College, Faridkot-151203, India.
Dean (Academics), P.T.U., Jalandhar-144001, India.
Mechanical Engineering Department, F.C.E.T. Ferozepur-152002, India.
Metallurgical & Materials Engineering Department, I.I.T. Roorkee -247667, India.

DOI: 10.4236/jmmce.2011.107045                

Abstract

In this work, TiAlN and AlCrN coatings were deposited on ASTM-SA213-T-22 boiler steel using Balzer’s rapid coating system (RCS) machine (make Oerlikon Balzers, Swiss) under a reactive nitrogen atmosphere. Cyclic oxidation studies in molten salt environment were conducted at 900°C temperature in the laboratory using silicon carbide furnace. The weight gain was measured after each cycle and visually examined the surface morphology of the oxidized samples was studied using FE-SEM with EDAX attachment and XRD analysis. The results obtained showed the better performance of TiAlN coated T-22 boiler steels than the AlCrN coated and uncoated T-22 boiler steel.

Keywords

Nanostructured coating, Hot corrosion, Oxide Scale, Physical vapour deposition, Scale morphology.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	L. Pawlowski; The Science and Engineering of Thermal Spray Coatings; Wiley; New York; 1995.
[2]	B. Q. Wang, G. Q. Geng, A. V. Levy; Surface & Coating Technology; 1992; 54-55; 529-35.
[3]	L. Fedrizzi , S. Rossi , R. Cristel , P.L. Bonora , Elect. Chem. Acta 49 (2004) 2803– 2814.
[4]	Harpreet Singh, D. Puri and S. Prakash, International Symposium of Research Students on Materials Science and Engineering, December 20-22, 2004, Indian Institute of Technology Madras, Chennai, India.
[5]	G. Bertrand, H. Mahdjoub, C. Meunier, Surf. & Coat. Technol. 126 (2000) 199-209.
[6]	L. Cunha, M. Andritschky , L. Rebouta , K. Pischow, Surf. & Coat. Technol. 116–119 (1999) 1152–1160.
[7]	Xing-zhao Ding, A.L.K. Tan, X.T. Zeng, C. Wang, T. Yue, C.Q. Sun, Thin Solid Films 516(2008) 5716-5720.
[8]	B.R. Marple, J. Voyer, J. F. Bisson, C. Moreau, J. Mater. Process. Technol. 117 (2001), 418-423.
[9]	Mahesh, R. A., Jayagandhan, R. and Prakash, S., (2008), “A Study on Hot Corrosion Behaviour of Ni-5AL Coatings on Ni- and Fe-based Superalloys in an Aggressive Environment at 900°C,” J. Alloy and Compounds, Vol. 460, No. 1-2, pp. 220-231.
[10]	Singh, H., Prakash, S. and Puri, D., (2007), “Some Observations on the High Temperature Oxidation Behaviour of Plasma Sprayed Ni3Al Coatings,” Mater. Sci. Engg. A, 444 (2007) 242-250.
[11]	Sidhu, T. S., Agarwal, R. D. and Prakash, S., (2006E), “Hot Corrosion of a NiCr Coated Ni-based Alloy,” Scripta Materialia, Vol. 55, pp. 179-182.
[12]	Kolta, G. A., Hewaidy, L. F. and Felix, N. S., (1972), “Reactions Between Sodium Sulphate and Vanadium Pentoxide,” Thermochim. Acta, Vol. 4, pp. 151-164.
[13]	Seierdten, M and Kofstad, P., (1987), “Effect of SO3 on Vanadate Induced Hot Corrosion,” High Temp. Technol., Vol. 5, No. 3, pp. 115-122.
[14]	Swaminathan, J., Raghavan, S. and Iyer, S.R., (1993), “Studies on the Hot Corrosion of Some Nickel-base Superalloys by Vanadium Pentaoxide,” T. Indian I. Metals, Vol. 46, No. 3, pp. 175-181.
[15]	Fryburg, G. C., Kohl, F. J., Stearns, C. A. and Fielder, W. L., (1982), “Chemical Reactions Involved in the Initiation of Hot Corrosion of B-1900 and NASA-TRW VIA,” J. Electrochem. Soc., Vol. 129, No. 3, pp. 571-85.
[16]	Sidhu, B.S., Puri, D. and Prakash, S., (2005), “Mechanical and Metallurgical Properties of Plasma Sprayed and Laser Remelted Ni-20Cr and Stellite-6 Coatings,” J. Mater. Process. Technol., Vol. 159, No. 3, pp. 347-355.
[17]	Harpreet Singh, Puri, D. and Prakash, S., (2005), “Corrosion Behaviour of Plasma Sprayed Coatings on a Ni-base Superalloy in Na2SO4-60%V2O5Environment at 900°C,” Metall. Mater. Trans. A, Vol. 36, No. 4, pp. 1007-1015.
[18]	Tiwari, S. N. and Prakash, S., (1996), “Hot Corrosion Behaviour of an Iron-Base Superalloy in Salt Environment at Elevated Temperatures,” Proc. of Sympos. Metals and Materials Research, Indian Institute of Technology Madras, Madras, 4-5th July, pp. 107-117.
[19]	Ul-Hamid, A., (2004), “A TEM Study of the Oxide Scale Development in Ni-Cr-Al Alloys,” Corros. Sci., Vol. 46, No. 1, pp. 27-36.
[20]	Shi, L., (1995), “On the Possibility of a Na2SO4-Na2O Eutectic Melt Developing on Metals Coated with Na2SO4 Deposit in Oxygen/Air at Intermediate Temperatures,” Corros. Sci., Vol. 37, No. 8, pp. 1281-1287.
[21]	Sadique, S. E., Mollah, A. H., Islam, M. S., Ali, M. M., Megat, M. H. H. and Basri, S., (2000), “High-Temperature Oxidation Behavior of Iron-Chromium-Aluminum Alloys,” Oxid. Met., Vol. 54, Nos. 5-6, pp. 385-400.
[22]	Chatterjee, U. K., Bose, S. K. and Roy, S. K., (2001), “Environmental Degradation of Metals,” Pub., Marcel Dekker, 270 Madison Avenue, New York.
[23]	Lai, G. Y., (1990), ‘High Temperature Corrosion of Engineering Alloys,’ ASM Inter. Book, pp. 15-46.
[24]	Peters, K. R., Whittle, D. P. and Stringer, J., (1976), “Oxidation and Hot Corrosion of Nickel-Based Alloys Containing Molybdenum,” Corros. Sci., Vol. 16, pp. 791-804.
[25]	Pettit, F. S. and Meier, G. H., (1985), “Oxidation and Hot corrosion of Superalloys,” Superalloys 85, Eds. Gell, M., Kartovich, C. S., Bricknel, R. H., Kent W. B. and Radovich, J. F., Met. Soc. of AIME, Warrendale, Pensylvania, pp. 651-687.
[26]	Misra, A. K., (1986), “Mechanism of Na2SO4-Induced Corrosion of Molybdenum Containing Nickel-Base Superalloys at High Temperatures,” J. Electrochem. Soc., Vol. 133, No. 5, pp. 1029-37.
[27]	Wang, B. Q. and Luer, K., (1994), “The Relative Erosion-Corrosion Resistance of Commercial Thermal Sprayed Coatings in a Simulated Circulating Fluidized Bed Combustor Environment,” Proc. of the 7th National Spray Conf., 20-24th June, Boston, Massachusetts, pp. 115-20.
[28]	Evans, H. E. and Taylor, M. P., (2001), “Diffusion Cells and Chemical Failure of MCrAlY Bond Coats in Thermal Barrier Coating Systems,” Oxid. Met., Vol. 55, pp.17-34.
[29]	Niranatlumpong, P., Ponton, C. B. and Evans, H. E., (2000), “The Failure of Protective Oxides on Plasma-Sprayed NiCrAlY Overlay Coatings,” Oxid. Met., Vol. 53, No. 3-4, pp. 241-256.