Original scientific paper
https://doi.org/10.5599/jese.222
Thermodynamic, adsorption and corrosion inhibitive behaviour of benzyl nicotinate on cold rolled steel in sulphuric acid solution
Mutugadahalli Rangaswamy Vinutha
; Department of Chemistry, School of Chemical Science, Jnana Sahyadri Campus, Kuvempu University, Shankaraghatta-577451, Karanataka, India
Thimmappa Venkatarangaiah Venkatesha
; Department of Chemistry, School of Chemical Science, Jnana Sahyadri Campus, Kuvempu University, Shankaraghatta-577451, Karanataka, India
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.
Keywords
EIS; Inhibitor; Thermodynamic properties; Langmuir isotherm; AFM; Optical microscopy
Hrčak ID:
149443
URI
Publication date:
26.9.2015.
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