ABSTRACT Influence of microstructure on electrochemical behavior of nanocrystalline Fe88Si12 alloy has been investigated in 3.5 wt% NaCl solution. The results show that FFe88Si12 alloy with optimal corrosion resistance is composite of ordered Fe3Si and disordered Fe(Si) phases and grain size of 40 nm. Because the ordered Fe3Si structure is beneficial to form SiO2 film, which possesses good corrosion resistance compared with the Fe2O3 film from disordered Fe(Si). Moreover, although the decreased grain size is conducive to form preservative, as the grain size decreases to 10 nm, the grain boundary increases to above 30 vol%, which is the active sites for corrosion attack.
Cite this paper
nullL. Fu, J. Yang, Q. Bi and W. Liu, "Electrochemical Behavior of Nanocrystalline Fe88Si12 Alloy in 3.5% NaCl Solution," Materials Sciences and Applications, Vol. 2 No. 5, 2011, pp. 435-438. doi: 10.4236/msa.2011.25057.
 S. Mato, G. Alcala, T. G. Woodcock, A. Gebert, J. Eckert and L. Schultz, “Corrosion Behaviour of a Ti-Base Nanostructure-Dendrite Composite,” Electrochimica Acta, Vol. 50, No.12, April 2005, pp. 2461-2467. doi:10.1016/j.electacta.2004.10.071
 F. Renner, A. Stierle, H. Dosch, D. M. Kolb, T. L. Lee and J. Zegenhagen, “Initial Corrosion Observed on the Atomic Scale,” Nature, Vol. 439, No. 9, February 2006, pp. 707-710. doi:10.1038/nature04465
 J. Balaraju, V. E. Selvi and K. Rajam, “Electrochemical Behavior of Nanocrystalline Ni-P Alloys Containing Tin and Tungsten,” Protection of Metals and Physical Chemistry of Surfaces, Vol. 46, No. 6, 2010, pp. 686-691. doi:10.1134/S2070205110060109
 S. Mathur, R. Vyas, P. Kulriya, K. Asokan, K. Sachdev and S. K. Sharma, “Effects of Irradiation on the Electrochemical Behavior of the Alloy Ti60Ni40,” Journal of Alloys and Compounds, Vol. 503, No. 1, 30 July 2010, pp. 192-193. doi:10.1016/j.jallcom.2010.04.231
 V. Cremaschi, I. Avram, T. Perez and H. Sirkin, “Electrochemical Studies of Amorphous, Nanocrystalline, and Crystalline FeSiB Based Alloys,” Scripta Material, Vol. 46, No. 1, January 2002, pp. 95-100. doi:10.1016/S1359-6462(01)01204-0
 R. Mishra and R. Balasubramaniam, “Effect of Nanocrystalline Grain Size on the Electrochemical and Corrosion Behavior of Nickel,” Corrosion Science, Vol. 46, No. 12, December 2004, pp. 3019-3029. doi:10.1016/j.corsci.2004.04.007
 L. Wang, Y. Lin, Z. Zeng, W. Liu, Q. Xue, L. Hu and J. Zhang, “Electrochemical Corrosion Behavior of Nanocrystalline Co Coatings Explained by Higher Grain Boundary Density,” Electrochimica Acta, Vol. 52, No. 13, Mar- ch 2007, pp. 4342-4350. doi:10.1016/j.electacta.2006.12.009
 J. Xu, L. Liu, X. Lu and S. Jiang, “Effect of Carbon Doping on Electrochemical Behaviour of Nanocrystalline Ti5Si3 Film in NaCl Solution,” Electrochemistry Communications, Vol. 13, No. 1, January 2011, pp. 102-105. doi:10.1016/j.elecom.2010.11.028
 A. Vinogradov, T. Mimaki and S. Hashimoto, “On the Corrosion Behaviour of Ultra-Fine Grain Copper,” Scrip ta Material, Vol. 41, No. 3, July 1999, pp. 319-326. doi:10.1016/S1359-6462(99)00170-0
 R. Li, Q. Shen, L. Zhang and T. Zhang, “Magnetic Properties of High Silicon Iron Sheet Fabricated by Direct Powder Rolling,” Journal of Magnetism and Magnetic Materials, Vol. 281, No. 2-3, October 2004, pp. 135-139. doi:10.1016/j.jmmm.2004.04.098
 M. Komatsubara, K. Sadahiro, O. Kondo, T. Takamiya and A. Honda, “Newly Developed Electrical Steel for High-Frequency Use,” Journal of Magnetism and Magnetic Materials, Vol. 242-245, No. 1, April 2002, pp. 2l2-215.
 L. C. Fu, J. Yang, Q. L. Bi, J. Q. Ma and W. M. Liu, “Combustion Synthesis and Characterization of Bulk Nanocrystalline Fe88Si12 Alloy,” IEEE Transactions on Nanotechnology, Vol. 9, No. 2, March 2010, pp. 218-222. doi:10.1109/TNANO.2009.2028023
 M. Stern and A. L. Geary, “Electrochemical Polarization,” Journal of the Electrochemical Society, Vol. 104, No. 1, January 1957, pp. 56-63. doi:10.1149/1.2428438
 G. Z. Meng, Y. Li and F. H. Wang, “The Corrosion Behavior of Fe–10Cr Nanocrystalline Coating,” Electrochimica Acta, Vol. 51, No. 20, May 2006, pp. 4277-4284. doi:10.1016/j.electacta.2005.12.015
 U. Wolff, F. Schneider, K. Mummert and L. Schultz, “Stability and Electrochemical Properties of Passive Layers on Fe-Si Alloys,” Corrosion, Vol. 56, No. 12, December 2000, pp. 1195-1201. doi:10.5006/1.3280507
 G. Palumbo and K. T. Aust, “Structure-Dependence of Intergranular Corrosion in High Purity Nickel,” Acta Metallurgica et Materialia, Vol. 24, No. 11, November 1990, pp. 2343-2352. doi:10.1016/0956-7151(90)90101-L
 A. Atkinson, “A Theoretical Analysis of the Oxidation of Fe-Si Alloys,” Corrosion Science, Vol. 22, No. 2, February 1982, pp. 87-102. doi:10.1016/0010-938X(82)90071-3