Electrochemical Study of the Corrosion Inhibition of Mild Steel in Hydrochloric Acid by Amlodipine Drug

Authors

  • I. A Akpan Corrosion and Materials Science Unit, Department of Chemistry, University of Uyo, Nigeria
  • N. O Offiong Corrosion and Materials Science Unit, Department of Chemistry, University of Uyo, Nigeria

Abstract

The inhibition of mild steel corrosion in acidic medium inhibited by amlodipine at room temperature (30oC) was monitored via the linear polarization resistance electrochemical technique using a variable voltage, DC power supply (AC mV metre, 2channel model GVT 427). The concentration of the acid medium was maintained at 0.1M HCl throughout the experiment. The inhibition efficiency was found to increase with increase in the concentration of the drug in the corrosive medium. The highest polarization resistance (Rp) (1083Ωcm2) was obtained at the highest inhibitor concentration (10.0×10-3M) while the lowest Rp (567Ωcm2) was recorded against the lowest inhibitor concentration (2.5×10-3M). The adsorption mode of the drug was found to be by monolayer chemisorptions having found the experimental data obeyed the Langmuir adsorption isotherm.

Keywords:

Linear polarization resistance (LPR), Corrosion inhibition, Mild steel, Amlodopine, HCl

Published

2014-03-20

How to Cite

Akpan, I. A., & Offiong, N. O. (2014). Electrochemical Study of the Corrosion Inhibition of Mild Steel in Hydrochloric Acid by Amlodipine Drug. International Journal of Chemistry and Materials Research, 2(3), 23–29. Retrieved from https://archive.conscientiabeam.com/index.php/64/article/view/1827

Issue

Vol. 2 No. 3 (2014)

Section

Articles