Electrochemical and Mechanical Studies of Epoxy Coatings Containing Eco-Friendly Nanocomposite Consisting of Silane Functionalized Clay–Epoxy on Mild Steel

In this study, new clay/silane/epoxy nanocomposites (CSE nanocomposite) were fabricated to enhance the corrosion resistance of epoxy resin. The surface of the clay is modified using 3-aminopropyltriethoxysilane (APTES). The functionalized clay nanoparticle was characterized by Fourier-transform infr...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2020, Vol.6 (4), Article 126
Main Authors: Beryl, J. Raja, Xavier, Joseph Raj
Format: Article
Language:English
Subjects:
Aminopropyltriethoxysilane
Biomaterials
Chemistry and Materials Science
Clay
Coatings
Coordination compounds
Corrosion
Corrosion and Coatings
Corrosion prevention
Corrosion products
Corrosion resistance
Electrochemical impedance spectroscopy
Emission analysis
Epoxy coatings
Epoxy resins
Fourier transforms
Immersion
Immersion tests (corrosion)
Infrared analysis
Infrared spectroscopy
Low carbon steels
Materials Science
Mechanical properties
Microscopy
Morphology
Nanocomposites
Nanoparticles
Polymers
Scanning electron microscopy
Sodium chloride
Solid Mechanics
Spectroscopic analysis
Spectrum analysis
Steel
Thermogravimetric analysis
Tribology
X-ray diffraction
X-ray spectroscopy
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Summary:In this study, new clay/silane/epoxy nanocomposites (CSE nanocomposite) were fabricated to enhance the corrosion resistance of epoxy resin. The surface of the clay is modified using 3-aminopropyltriethoxysilane (APTES). The functionalized clay nanoparticle was characterized by Fourier-transform infrared spectroscopy, and thermogravimetric analysis. The fabricated clay nanocomposites coated mild steel was evaluated by electrochemical impedance spectroscopy, scanning electrochemical microscopy and X-ray diffraction (XRD) studies in 3.5% NaCl solution for various days. The experiments indicated that the best epoxy coating performance was obtained by the incorporation of functionalized clay nanoparticles 4 wt% in the epoxy resin. The coated mild steel by CSE nanocomposites showed higher coating resistance ( R c  = 238,967 Ω cm 2 ) than that of neat epoxy coating ( R c  = 129,532 Ω cm 2 ). Mechanical properties of the coatings were also found to be improved in the presence of modified clay nanoparticle in tensile and hardness measurements. The use of nanoclays enhanced the anticorrosive behavior and physical integrity of the polymer–clay coatings under immersion tests. The surface morphology of the coated sample was analyzed by field-emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. XRD analysis confirms the formation of metal complexes as the corrosion products at 40 days of immersion in 3.5% NaCl solution.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-020-00424-0