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M. G. Fontana, Corrosion Engineering, McGraw-Hill International Edition, 3rd ed., pp. 23–27 and pp. 499–503.

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• TITLE: Effect of Silicon on the Corrosion Behavior of Powder-Processed Phosphoric Irons

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

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

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.9 No.10, October 20, 2010

  ABSTRACT: The corrosion behaviour of phosphoric irons (i.e. Fe-P alloys containing low phosphorous in the range 0.1 to 0.7 wt. % ) containing chromium with/without addition of silicon, 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 silicon improved the resistance to corrosion in all the environments. Corrosion rates were higher in acid medium, minimal in alkaline medium and low in neutral solution.