Dendrimers: A new class of corrosion inhibitors for mild steel in 1 M HCl: Experimental and quantum chemical studies

Chandrabhan Verma; Eno E. Ebenso; Yeddu Vishal; M.A.Quraishi

doi:10.1016/j.molliq.2016.10.117

Dendrimers: A new class of corrosion inhibitors for mild steel in 1 M HCl: Experimental and quantum chemical studies

Chandrabhan Verma, Eno E. Ebenso^*, Yeddu Vishal, M.A.Quraishi

^*Corresponding author for this work

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

47 Scopus citations

Abstract

The inhibition properties of two ammonia cored dendrimers have been investigated for mild steel corrosion in 1 M hydrochloric acid solution using chemical, electrochemical, surface and quantum chemical calculation methods. It was observed that inhibition efficiency increases with increasing the concentration of both the dendrimers and maximum efficiency was obtained at 50 ppm (50 mgL^− 1) concentration. Potentiodynamic study suggested that investigated dendrimers behaved as mixed inhibitors and their adsorption on mild steel surface obeyed the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of mild steel surface confirmed the inhibition behavior of investigated inhibitor molecules. Atomic force microscopic (AFM) study revealed that studied compounds increases the surface smoothness of AFM micrographs by adsorbing on the metallic surface. Several quantum chemical calculations parameters were calculated and the results obtained were found to be consistent with the experimental findings.

Original language	English
Pages (from-to)	1282-1293
Number of pages	12
Journal	Journal of Molecular Liquids
Volume	224
DOIs	https://doi.org/10.1016/j.molliq.2016.10.117
State	Published - 1 Dec 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Corrosion inhibition
Dendrimer
Polarization
Quantum chemical calculation
SEM/EDX/AFM

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry
Materials Chemistry

Access to Document

10.1016/j.molliq.2016.10.117

Cite this

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title = "Dendrimers: A new class of corrosion inhibitors for mild steel in 1 M HCl: Experimental and quantum chemical studies",

abstract = "The inhibition properties of two ammonia cored dendrimers have been investigated for mild steel corrosion in 1 M hydrochloric acid solution using chemical, electrochemical, surface and quantum chemical calculation methods. It was observed that inhibition efficiency increases with increasing the concentration of both the dendrimers and maximum efficiency was obtained at 50 ppm (50 mgL− 1) concentration. Potentiodynamic study suggested that investigated dendrimers behaved as mixed inhibitors and their adsorption on mild steel surface obeyed the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of mild steel surface confirmed the inhibition behavior of investigated inhibitor molecules. Atomic force microscopic (AFM) study revealed that studied compounds increases the surface smoothness of AFM micrographs by adsorbing on the metallic surface. Several quantum chemical calculations parameters were calculated and the results obtained were found to be consistent with the experimental findings.",

keywords = "Corrosion inhibition, Dendrimer, Polarization, Quantum chemical calculation, SEM/EDX/AFM",

author = "Chandrabhan Verma and Ebenso, \{Eno E.\} and Yeddu Vishal and M.A.Quraishi",

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doi = "10.1016/j.molliq.2016.10.117",

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T2 - A new class of corrosion inhibitors for mild steel in 1 M HCl: Experimental and quantum chemical studies

AU - Verma, Chandrabhan

AU - Ebenso, Eno E.

AU - Vishal, Yeddu

AU - M.A.Quraishi,

PY - 2016/12/1

Y1 - 2016/12/1

N2 - The inhibition properties of two ammonia cored dendrimers have been investigated for mild steel corrosion in 1 M hydrochloric acid solution using chemical, electrochemical, surface and quantum chemical calculation methods. It was observed that inhibition efficiency increases with increasing the concentration of both the dendrimers and maximum efficiency was obtained at 50 ppm (50 mgL− 1) concentration. Potentiodynamic study suggested that investigated dendrimers behaved as mixed inhibitors and their adsorption on mild steel surface obeyed the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of mild steel surface confirmed the inhibition behavior of investigated inhibitor molecules. Atomic force microscopic (AFM) study revealed that studied compounds increases the surface smoothness of AFM micrographs by adsorbing on the metallic surface. Several quantum chemical calculations parameters were calculated and the results obtained were found to be consistent with the experimental findings.

AB - The inhibition properties of two ammonia cored dendrimers have been investigated for mild steel corrosion in 1 M hydrochloric acid solution using chemical, electrochemical, surface and quantum chemical calculation methods. It was observed that inhibition efficiency increases with increasing the concentration of both the dendrimers and maximum efficiency was obtained at 50 ppm (50 mgL− 1) concentration. Potentiodynamic study suggested that investigated dendrimers behaved as mixed inhibitors and their adsorption on mild steel surface obeyed the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of mild steel surface confirmed the inhibition behavior of investigated inhibitor molecules. Atomic force microscopic (AFM) study revealed that studied compounds increases the surface smoothness of AFM micrographs by adsorbing on the metallic surface. Several quantum chemical calculations parameters were calculated and the results obtained were found to be consistent with the experimental findings.

KW - Corrosion inhibition

KW - Dendrimer

KW - Polarization

KW - Quantum chemical calculation

KW - SEM/EDX/AFM

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