The Electrochemical Behavior of Carbon Steel Wires of Nepal in Different Environments

  • Jagadish Bhattarai Central Department of Chemistry
Keywords: Carbon steel wire, Corrosion tests, Polarization measurement, HCl, NaCl and NaOH solutions


The electrochemical behavior of carbon steel wires of Nepal is studied in 1 M HCl, 0.5 M NaCl and 1 M NaOH solutions at 25°C, open to air using immersion tests and electrochemical measurements. The corrosion rates of the carbon steel wires were found to be about 20-50 mm/y in acidic 1 M HCl and 0.1-0.2 mm/y in neutral 0.5 M NaCl. The corrosion rate of all the examined steel wires in alkaline 1 M NaOH solution (that is, 7 - 18 x 10-3 mm/y) was found nearly three orders of magnitude lower corrosion resistance than in 1 M HCl solution at 25°C, mostly due to an ennoblement of the open circuit potentials of the steel wires at passive potential regions (that is, -200 to 250 mV vs SCE) in 1 M NaOH solution. The steel wires seem to be very corrosion resistance materials in very alkaline environments like cement-based materials.

Keywords: Carbon steel wire; Corrosion tests; Polarization measurement; HCl;  NaCl and NaOH solutions

DOI: 10.3126/jncs.v24i0.2388

Journal of Nepal Chemical Society Vol. 24, 2009 Page: 31-38




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Author Biography

Jagadish Bhattarai, Central Department of Chemistry
professor, Central Department of Chemistry, T.U. Kirtipur, Nepal
How to Cite
Bhattarai, J. (1). The Electrochemical Behavior of Carbon Steel Wires of Nepal in Different Environments. Journal of Nepal Chemical Society, 24, 31-38.