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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 1/2015

01-01-2015 | Original Paper

Studying the effects of surface modification of Cr2O3 nanoparticles by 3-aminopropyltrimethoxysilane (APTMS) on its corrosion inhibitive performance

Authors: M. J. Palimi, M. Rostami, M. Mahdavian, B. Ramezanzadeh

Published in: Journal of Sol-Gel Science and Technology | Issue 1/2015

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Abstract

Cr2O3 nanoparticles were modified with 3-aminopropyltrimethoxysilane (APTMS). The APTMS grafting on the surface of the nanoparticles was analyzed by turbidimeter, thermal gravimetric analysis and Fourier transform infrared spectroscopy. The corrosion performance of the mild steel panels immersed in the 3.5 wt% NaCl solutions containing modified and unmodified pigments extracts was studied by electrochemical impedance spectroscopy and linear polarization techniques. The surface morphology of the samples was characterized by scanning electron microscopy. The type and concentration of the released ions from the pigments were measured by inductively coupled plasma. Results revealed that APTMS grafted on the surface of nanoparticles successfully. It was found that Cr2O3 nanoparticles released inhibitive species causing the decrease of corrosion rate of the steel sample in the 3.5 wt% NaCl solution. However, the unmodified nanoparticles released higher ions and showed better inhibitive performance than the modified one. A lower surface degradation of the steel specimen exposed to the solution containing unmodified pigment extract was observed compared to the modified one.
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Metadata
Title
Studying the effects of surface modification of Cr2O3 nanoparticles by 3-aminopropyltrimethoxysilane (APTMS) on its corrosion inhibitive performance
Authors
M. J. Palimi
M. Rostami
M. Mahdavian
B. Ramezanzadeh
Publication date
01-01-2015
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 1/2015
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-014-3505-3

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