Inhibition of mild steel corrosion in HCl solution using amino acid L-tryptophan

Authors

  • M Mobin Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.
  • Mosarrat Parveen Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.
  • M Alam Khan Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.

Keywords:

Mild steel, Corrosion inhibition, L-Tryptophan, Adsorption, Electrochemical technique.

Abstract

The corrosion inhibition characteristics of nitrogen containing amino acid L-tryptophan on mild steel in 0.1 M HCl solution was studied by weight loss and potentiodynamic polarization measurements. L-tryptophan significantly reduces the corrosion rates of mild steel; the maximum inhibition efficiency being 83% at 50 oC in presence of inhibition concentration of 500 ppm. The adsorption of inhibitors on mild steel surface obeyed Langmuir’s adsorption isotherm. The calculated thermodynamic parameters for adsorption reveal a strong interaction between the inhibitors and the mild steel surface. The results obtained by electrochemical studies are consistent with the results of the weight loss measurement. L-tryptophan acts more anodic than cathodic inhibitor.

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Author Biographies

M Mobin, Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.

Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.

Mosarrat Parveen, Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.

Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University,Aligarh-202002- India.

M Alam Khan, Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh-202002- India.

Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University,Aligarh-202002- India.

Published

14-01-2012

How to Cite

Mobin, M., Parveen, M., & Khan, M. A. (2012). Inhibition of mild steel corrosion in HCl solution using amino acid L-tryptophan. Recent Research in Science and Technology, 3(12). Retrieved from https://updatepublishing.com/journal/index.php/rrst/article/view/846

Issue

Volume 3, Issue 12 (2011)

Section

Articles