Abstract
The search for highly effective corrosion protection solutions to avoid degradation of the metallic parts is enabling the development of polymeric organic coatings. Of particular relevance, polymeric nanocomposite coatings, modified with corrosion inhibitors, have been developed to provide enhanced surface protection. In this work, yttrium oxide nanoparticles loaded with corrosion inhibitor (Imidazole), used as additives in the formulation of epoxy for coated on the steel substrate. The loading of Y2O3 with imidazole was confirmed by field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and Brunauer–Emmett–Teller analysis. UV-Vis analysis demonstrated the pH-sensitive behavior of the imidazole that helps in self-release when necessary. Electrochemical impedance spectroscopy (EIS) of the coated samples revealed that the coating modified with Y2O3/IMD provides better corrosion protection compared to coatings containing only Y2O3. XPS analysis validated the presence of an imidazole protective film on the steel substrate that enhanced the corrosion resistance of the coated samples
Highlights
IntroductionA very effective route to protect metallic assets from corrosion is by the application of protective organic coatings
The results revealed that Y2 O3 loaded with imidazole improves the corrosion resistivity of the epoxy coated steel substrates by attaining 99% corrosion inhibition efficiency
The loading of imidazole into Y2 O3 confirmed by Fourier transform infrared spectroscopy (FTIR), while thermogravimetric analysis (TGA) evidences the loading capacity of the Y2 O3 nanoparticles
Summary
A very effective route to protect metallic assets from corrosion is by the application of protective organic coatings. There has been an increase in academic and industrial research in developing organic coatings containing anti-corrosive pigments for the protection of metallic parts in different environments [1,2]. Coatings are modified with anti-corrosive pigments that release inhibiting species able to protect the metallic parts, contributing to a higher lifespan [3,4,5]. Among the new non-toxic anticorrosive pigments introduced to substitute chromates, zinc phosphate has been widely accepted since its toxic level is reduced, and many studies have shown good its corrosion inhibition properties [8]
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