La, Sr and Co Based Coatings Obtained on Ferritic Stainless Steel by Dip-Coating Technique

Abstract:

The ferritic stainless steels have been used in applications where suitable properties are required at high temperatures. These metallic materials are applied, for example, as interconnects in ITSOFC fuel cells (600-800 °C).The aim of this work is to produce a La, Sr and Co based coatings using the dip-coating and spray pyrolysis techniques, on an AISI 430 ferritic stainless steel. These coatings are known for acting as barriers, increasing the oxidation resistance when applied on stainless steel at high temperatures. The obtained coatings were heat treated at 800 °C for 120 min, seeking the formation of La_0,6Sr_0,4Co,and, then characterized regarding their morphology and microstructure using scanning electron microscopy (SEM) and X-ray diffraction. The results showed that the coatings obtained by spray pyrolysis covered regularly the surface while the ones obtained by dip-coating exhibited some crack formation.

• Periodical: Materials Science Forum (Volumes 775-776)
• Pages: 507-511
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.775-776.507
• Online since: January 2014
• Authors: Matias Angelis Korb, Micael Atolini, José Carlos Oliveira Junior, Israel Durli Savaris, Gustavo Alberto Ludwig, Célia de Fraga Malfatti
• Keywords: Barrier Coatings, Dip Coating, Ferritic Stainless Steel, ITSOFC, Metallic Interconnects, Spray Pyrolysis

References

[1] H. Tu and U. Stimming: J. Power Sources Vol. 127 (2004), p.284.

[2] J.M. Andújar and F. Segura: Renewable and Sustainable Energy Reviews Vol. 13 (2009), p.2309.

[3] J. Huang, F. Xie, C. Wang and Z. Mao: Int. J. Hydrogen Energy Vol. 37 (2012), p.877.

[4] W. Qu, J. Li and D.G. Ivey: J. Power Sources Vol. 138 (2004), p.162.

[5] X. Chen, P.Y. Hou, C.P. Jacobson, S.J. Visco and L.C. Jonghe: Solid State Ionics Vol. 176 (2005), p.425.

[6] P. Piccardo, P. Gannon, S. Chevalier, M. Viviani, A Barbucci, G. Caboche, R. Amendola and S. Fontana: Surf. Coat. Technol. Vol. 202 (2007), p.1221.

DOI: 10.1016/j.surfcoat.2007.07.096

[7] N. Shaigan, W. Qu, D.G. Ivey and W. Chen: J. Power Sources Vol. 195 (2010), p.1529.

[8] M. Stanislowski, J. Froitzheim, L. Niewolak, W.J. Quadakkers, K. Hilpert, T. Markus and L. Singheiser: J. Power Sources Vol. 164 (2007), p.578.

DOI: 10.1016/j.jpowsour.2006.08.013

[9] E. Bontempi, L. Armelao, D. Barreca, L. Bertolo, G. Bottaro, E. Pierangelo and L.E. Depero: Cryst. Eng. Vol. 5 (2002), p.291.

DOI: 10.1016/s1463-0184(02)00040-0