The Passivation Behavior of Carbon Steel Rods of Nepal in Different Media

Authors

  • J. Bhattarai Tribhuvan University
  • A. Kafle Tribhuvan University
  • N. P. Bhattarai Tribhuvan University

DOI:

https://doi.org/10.3126/jncs.v22i0.520

Abstract

The passivation behavior of carbon steel rods of Nepal is studied in 1 M HCl, 0.5 M NaCl and 1 M NaOH solutions at 25°C, open to air using corrosion tests and electrochemical measurements. The corrosion rate of all the examined steel rods is significantly lower in 1 M NaOH solution (about 10-3 mm/y) than those in 0.5 M NaCl (about 10-2 mm/y) and 1 M HCl (about 101-102 mm/y) solutions. The corrosion rate of SR71 steel rod is remarkably lower (3.65 mm/y) than those of other four different steel rods (3-4 x 102 mm/y) of Nepal in 1 M HCl solution. The ennoblement of the open circuit potentials of all the examined steel rod specimens is clearly observed in 1 M NaOH solution than those in 0.5 M NaCl and 1 M HCl solutions. The open circuit potentials of the steel rods are in the passive potential regions of the iron wire in 1 M NaOH solution. Therefore, steel rods of different companies of Nepal showed significantly high corrosion resistance in 1 M NaOH solution at 25°C.

DOI: 10.3126/jncs.v22i0.520

Journal of Nepal Chemical SocietyVol. 22, 2007 pp.34-40

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Author Biographies

J. Bhattarai, Tribhuvan University

Lecturer Central Department of Chemistry Tribhuvan University

A. Kafle, Tribhuvan University

Lecturer Central Department of Chemistry Tribhuvan University

N. P. Bhattarai, Tribhuvan University

Lecturer Central Department of Chemistry Tribhuvan University

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How to Cite

Bhattarai, J., Kafle, A., & Bhattarai, N. P. (2007). The Passivation Behavior of Carbon Steel Rods of Nepal in Different Media. Journal of Nepal Chemical Society, 22, 34–40. https://doi.org/10.3126/jncs.v22i0.520

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