Effect of Chromium on the Corrosion Behavior of Powder-Processed Fe-0.6 wt % P Alloys


Phosphoric irons (i.e. Fe-P alloys containing low phosphorous in the range 0.1 to 0.7 wt. %) with/without addition of chromium were prepared by powder forging route. The corrosion behaviour of these alloys was studied in different environments. The various environments chosen were acidic (0.25 M H2SO4 solution of pH 0.6), neutral/marine (3.5 % NaCl solution of pH 6.8) and alkaline (0.5 M Na2CO3 + 1.0 M NaHCO3 solution of pH 9.4). The corrosion studies were conducted using Tafel Extrapolation and Linear Polarization techniques. The results were compared with the corrosion resistance of electrolytic Armco iron. It was observed that, chromium improved the resistance to corrosion in marine conditions only. Corrosion rates were higher in acid medium due to the enhanced hydrogen evolution and hence, the cathodic reaction. The corrosion rates were minimal in alkaline medium and low in neutral solution.

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Y. Mehta, S. Trivedi, K. Chandra and P. Mishra, "Effect of Chromium on the Corrosion Behavior of Powder-Processed Fe-0.6 wt % P Alloys," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 9, 2012, pp. 908-913. doi: 10.4236/jmmce.2012.119087.

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The authors declare no conflicts of interest.


[1] R. Vera, B. Rosales and C. Tapia, “Effect of the Exposure Angle in the Corrosion Rate of Plain Carbon Steel in a Marine Atmosphere,” Corrosion Science, Vol. 45, No. 2, 2003, pp. 321-337. doi:10.1016/S0010-938X(02)00071-9
[2] M. G. Fontana and Greene, “Corrosion Engineering,” 3rd Edition, McGraw-Hill International Edition, 2006, pp. 23-27 and 499-503.
[3] P. Lorbeer and W. J. Lorenz, “The Kinetics of Iron Dissolution and Passivation in Solutions Containing Oxygen,” Electrochimica Acta, Vol. 25, No. 4, 1980, pp. 375- 381. doi:10.1016/0013-4686(80)87026-5
[4] J. C. Hudson and J. F. Stanners, “The Corrosion Resistance of Low-Alloy Steels,” Journal Of The Iron And Steel Institute Vol. 180, 1955, pp. 271-284.
[5] R. N. Parkins, “Environment-Induced Cracking of Metals,” NACE, Houston, 1990.
[6] H. Stencel, H. Vehoff and P. Neumann, “Chemistry and Physics of Fracture,” Martinus Nijhoff, Dordrecht, 1987, p. 652. doi:10.1007/978-94-009-3665-2_40
[7] H. J. Cleary and N. D. Greene, “Corrosion Properties of Iron and steel,” Corrosion Science, Vol. 7, No. 12, 1967, pp. 821-831. doi:10.1016/S0010-938X(67)80115-X
[8] R. Balasubramaniam, “On the Corrosion Resistance of the Delhi Iron Pillar,” Corrosion Science, Vol. 42, No. 12, 2000, pp. 2103-2129. doi:10.1016/S0010-938X(00)00046-9
[9] R. Balasubramaniam and A. V. Ramesh Kumar, “Characterization of Delhi Iron Pillar Rust by X-Ray Diffraction, Fourier Infrared Spectroscopy, M?ssbauer Spectroscopy,” Corrosion Science, Vol. 42, No. 12, 2000, pp. 2085-2101. doi:10.1016/S0010-938X(00)00045-7
[10] G. Sahoo and R. Balasubramaniam, “Corrosion of Phosphoric Irons in Acidic Environments,” Journal of ASTM International, Vol. 5, No. 5, 2008, pp. 1-7.
[11] Y. Mehta, S. Trivedi, K. Chandra and P. S. Mishra, “Effect of Chromium on the Corrosion Behavior of Powder- Processed Fe-0.35 wt% P Alloys,” Journal of Minerals & Materials Characterization & Engineering, Vol. 8, No. 7, 2009, pp. 501-511.
[12] ASTM Standard G3-89, “Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing,” Annual Book of ASTM Standards, ASTM International, West Conshohocken, Vol. 3.02; 2006.
[13] ASTM Standard G102-89, “Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements,” Annual Book of ASTM Standards, ASTM International, West Conshohocken, Vol. 3.02, 2006.
[14] F. P. Ijsseling, “Application of Electrochemical Methods of Corrosion Rate Determination to System Involving Corrosion Product Layers,” British Corrosion Journal, London, Vol. 21, 1986, pp. 95-101.
[15] H. J. Flitt and D. Schweinsberg, “Evaluation of Corrosion Rate from Polarization Curves Not Exhibiting a Tafel Region,” Corrosion Science, Vol. 47, No. 12, 2005, pp. 3034-3052. doi:10.1016/j.corsci.2005.06.014
[16] A. Davydov, V. Rybalka, L. Beketaeva, G. Engelhardt, P. Jayaweera and D. Macdonald, “The Kinetics of Hydrogen Evolution and Oxygen Reduction on Alloy 22,” Corrosion Science, Vol. 47, No. 1, 2005, pp. 195-215. doi:10.1016/j.corsci.2004.05.005
[17] E. McCafferty, “Validation of Corrosion Rates Measured By the Tafel Extrapolation Method,” Corrosion Science, Vol. 47, No. 12, 2005, pp. 3202-3215. doi:10.1016/j.corsci.2005.05.046
[18] S. C. Dexter, “Handbook of Oceanographic Engineering Materials,” John Wiley and Sons, New York, 1979, p. 111.
[19] E. Sikora, A. Sadkowski and J. Flis, “Impedance Study of Effect of Phosphorus on Anodic Behavior of Iron in Carbonate/Bicarbonate Solutions,” Electrochimica Acta, Vol. 38, No. 16, 1993, pp. 2443-2447. doi:10.1016/0013-4686(93)85114-E
[20] C. L. Briant, “The Effect of Nickel, Chromium, and Manganese on Phosphorus Segregation in Low Alloy Steels,” Scripta Metallurgica, Vol. 15, No. 9, 1981, pp. 1013- 1018. doi:10.1016/0036-9748(81)90245-3

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