Thermodynamic, adsorption and corrosion inhibitive behaviour of benzyl nicotinate on cold rolled steel in sulphuric acid solution

  • Vinutha Rangaswamy Mutugadahalli Department of Chemistry, School of Chemical Science, Jnana Sahyadri Campus, Kuvempu University, Shankaraghatta-577451, Karanataka
  • Venkatesha Venkatarangaiah Thimmappa Department of Chemistry, School of Chemical Science, Jnana Sahyadri Campus, Kuvempu University, Shankaraghatta-577451, Karanataka
Keywords: EIS, Inhibitor, Thermodynamic properties, Langmuir isotherm, AFM, Optical microscopy

Abstract

The inhibition performance of benzyl nicotinate (BN) on corrosion of cold rolled steel (CRS) in 0.5 M H2SO4 solution has been investigated using weight loss, Tafel polarization and electrochemical impedance spectroscopy (EIS). The BN acts as mixed type inhibitor. The thermodynamic parameters indicate the comprehensive nature adsorption of BN on CRS which obey Langmuir isotherm. Morphological investigation of corrosion inhibition is carried out using AFM and optical microscopic studies support the formation of inhibitor film on CRS. There is a good agreement between the values of weight loss measurements and electrochemical studies.

 

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Published
26-09-2015
Section
Electrochemical Science