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Davydov, A., Rybalka, V., Beketaeva, L., Engelhardt, G., Jayaweera, P., and Macdonald, D., The Kinetics of Hydrogen Evolution and Oxygen Reduction on Alloy 22, Corros. Sci., Vol. 47, 2005, pp. 195–215.

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• TITLE: Effect of Chromium on the Corrosion Behavior of Powder-Processed Fe-0.35 wt % P Alloys

  AUTHORS: Yashwant Mehta, Shefali Trivedi, K. Chandra, P.S. Mishra

  KEYWORDS: Phosphoric Iron, Corrosion, Powder Metallurgy, Forged, Ancient iron.

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.8 No.7, July 20, 2009

  ABSTRACT: The corrosion behaviour of phosphoric irons (i.e. Fe-P alloys containing low phosphorous in the range 0.1 to 0.7 wt. %) with/without addition of chromium, prepared by powder forging route 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 (0.5M Na2CO3 + 1.0 M NaHCO3 solution of pH 9.4). The corrosion studies were conducted using Tafel Extrapolation and Linear Polarization techniques. The studies compare electrolytic Armco iron with phosphoric irons. It was observed that, chromium improved the resistance to corrosion in all the environments. 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.