Electrochemical Investigation of 4-Hydroxy n-[2-Methoxy Naphthalene Methylidene] Benzohydrazide as Corrosion Inhibitor of Mild Steel in Acidic Medium

V. R. Adinarayanan; P. Preethi Kumari; Suma A. Rao

doi:10.3103/S1068375522030024

Electrochemical Investigation of 4-Hydroxy n-[2-Methoxy Naphthalene Methylidene] Benzohydrazide as Corrosion Inhibitor of Mild Steel in Acidic Medium

V. R. Adinarayanan, P. Preethi Kumari, Suma A. Rao^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract: The corrosion rate of mild steel in hydrochloric acid and in sulphuric acid was determined by potentiodynamic polarization and electrochemical impedance spectroscopy in 0.5 M concentrations of HCl and of H₂SO₄ using 4-hydroxy n-[2-methoxy naphthalene methylidene] benzohydrazide (HNBH) as an inhibitor The inhibition efficiency of HNBH for the corrosion mitigation of mild steel was studied by varying the concentration of the inhibitor and temperature. It was found that the inhibition efficiency of HNBH increased with increase in the inhibitor concentration in both media. The maximum of 80% inhibition efficiency at the optimum inhibitor concentration of 2.5 × 10^–4 M was achieved. However, with an increase in temperature, the inhibition efficiency decreased. The corrosion inhibition by HNBH took place through physisorption. The adsorption isotherm fitting with the experimental data was identified to find out the mechanism of inhibition. The results indicated that HNBH functions as mixed type inhibitor and follows the Langmuir adsorption isotherm. The surface of the specimen was analyzed using scanning electron microscopy.

Original language	English
Pages (from-to)	269-280
Number of pages	12
Journal	Surface Engineering and Applied Electrochemistry
Volume	58
Issue number	3
DOIs	https://doi.org/10.3103/S1068375522030024
Publication status	Published - 06-2022

All Science Journal Classification (ASJC) codes

Surfaces and Interfaces
Surfaces, Coatings and Films
Industrial and Manufacturing Engineering

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title = "Electrochemical Investigation of 4-Hydroxy n-[2-Methoxy Naphthalene Methylidene] Benzohydrazide as Corrosion Inhibitor of Mild Steel in Acidic Medium",

abstract = "Abstract: The corrosion rate of mild steel in hydrochloric acid and in sulphuric acid was determined by potentiodynamic polarization and electrochemical impedance spectroscopy in 0.5 M concentrations of HCl and of H2SO4 using 4-hydroxy n-[2-methoxy naphthalene methylidene] benzohydrazide (HNBH) as an inhibitor The inhibition efficiency of HNBH for the corrosion mitigation of mild steel was studied by varying the concentration of the inhibitor and temperature. It was found that the inhibition efficiency of HNBH increased with increase in the inhibitor concentration in both media. The maximum of 80% inhibition efficiency at the optimum inhibitor concentration of 2.5 × 10–4 M was achieved. However, with an increase in temperature, the inhibition efficiency decreased. The corrosion inhibition by HNBH took place through physisorption. The adsorption isotherm fitting with the experimental data was identified to find out the mechanism of inhibition. The results indicated that HNBH functions as mixed type inhibitor and follows the Langmuir adsorption isotherm. The surface of the specimen was analyzed using scanning electron microscopy.",

author = "Adinarayanan, {V. R.} and Kumari, {P. Preethi} and Rao, {Suma A.}",

note = "Funding Information: The authors are grateful to Manipal Institute of Technology and Manipal Academy of Higher Education, Manipal, India, for providing laboratory facilities. The authors would also like to thank Dr. Padmalatha Rao for the fruitful discussion and support given during the preparation of the manuscript. Publisher Copyright: {\textcopyright} 2022, Allerton Press, Inc.",

year = "2022",

month = jun,

doi = "10.3103/S1068375522030024",

language = "English",

volume = "58",

pages = "269--280",

journal = "Surface Engineering and Applied Electrochemistry",

issn = "1068-3755",

publisher = "Pleiades Publishing",

number = "3",

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TY - JOUR

T1 - Electrochemical Investigation of 4-Hydroxy n-[2-Methoxy Naphthalene Methylidene] Benzohydrazide as Corrosion Inhibitor of Mild Steel in Acidic Medium

AU - Adinarayanan, V. R.

AU - Kumari, P. Preethi

AU - Rao, Suma A.

N1 - Funding Information: The authors are grateful to Manipal Institute of Technology and Manipal Academy of Higher Education, Manipal, India, for providing laboratory facilities. The authors would also like to thank Dr. Padmalatha Rao for the fruitful discussion and support given during the preparation of the manuscript. Publisher Copyright: © 2022, Allerton Press, Inc.

PY - 2022/6

Y1 - 2022/6

N2 - Abstract: The corrosion rate of mild steel in hydrochloric acid and in sulphuric acid was determined by potentiodynamic polarization and electrochemical impedance spectroscopy in 0.5 M concentrations of HCl and of H2SO4 using 4-hydroxy n-[2-methoxy naphthalene methylidene] benzohydrazide (HNBH) as an inhibitor The inhibition efficiency of HNBH for the corrosion mitigation of mild steel was studied by varying the concentration of the inhibitor and temperature. It was found that the inhibition efficiency of HNBH increased with increase in the inhibitor concentration in both media. The maximum of 80% inhibition efficiency at the optimum inhibitor concentration of 2.5 × 10–4 M was achieved. However, with an increase in temperature, the inhibition efficiency decreased. The corrosion inhibition by HNBH took place through physisorption. The adsorption isotherm fitting with the experimental data was identified to find out the mechanism of inhibition. The results indicated that HNBH functions as mixed type inhibitor and follows the Langmuir adsorption isotherm. The surface of the specimen was analyzed using scanning electron microscopy.

AB - Abstract: The corrosion rate of mild steel in hydrochloric acid and in sulphuric acid was determined by potentiodynamic polarization and electrochemical impedance spectroscopy in 0.5 M concentrations of HCl and of H2SO4 using 4-hydroxy n-[2-methoxy naphthalene methylidene] benzohydrazide (HNBH) as an inhibitor The inhibition efficiency of HNBH for the corrosion mitigation of mild steel was studied by varying the concentration of the inhibitor and temperature. It was found that the inhibition efficiency of HNBH increased with increase in the inhibitor concentration in both media. The maximum of 80% inhibition efficiency at the optimum inhibitor concentration of 2.5 × 10–4 M was achieved. However, with an increase in temperature, the inhibition efficiency decreased. The corrosion inhibition by HNBH took place through physisorption. The adsorption isotherm fitting with the experimental data was identified to find out the mechanism of inhibition. The results indicated that HNBH functions as mixed type inhibitor and follows the Langmuir adsorption isotherm. The surface of the specimen was analyzed using scanning electron microscopy.

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Electrochemical Investigation of 4-Hydroxy n-[2-Methoxy Naphthalene Methylidene] Benzohydrazide as Corrosion Inhibitor of Mild Steel in Acidic Medium

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