Preparation of graphene oxide modified by titanium dioxide to enhance the anti-corrosion performance of epoxy coatings

Chauhan

J of Applied Polymer Sci

et al. 2019

This article presents candle soot (CS) as anticorrosion coating material for mild steel (MS) in 3.5 wt % of NaCl solution using potentiodynamic polarization and electrochemical impedance spectroscopy. CS is easily available, low-cost material, and characterized by using X-Ray diffraction (XRD), Raman spectroscopy, UV-vis spectroscopy, Fourier-transform infrared (FTIR), and scanning electron microscopy (SEM). CS is superhydrobhobic in nature that helps to prevent corrosion by repelling water molecules from MS surface. The electrochemical results confirmed the prevention in corrosion process for MS using candle soot-epoxy (CS-EP) based anticorrosion coatings. The CS-based coatings displayed outstanding barrier properties in 3.5 wt % of NaCl solution in comparison to the neat EP coating. Different candle CS-EP coating combinations were tested that exhibited excellent corrosion inhibition performance with highest protection increased up to 98.45% at 0.2 wt % of CS. The surface morphological studies were used to analyze the MS surface conditions in absence and presence of CS-EP coating in 3.5 wt % of NaCl solution. CS-EP admixtures were also tested for their shielding effectiveness in the frequency range of 8.2-12.4 GHz and it has been found that on incorporation of 0.2 wt % of CS in EP resin total shielding effectiveness (SE T ) increased to −5.3 dB as compared to −0.33 dB for neat EP.

Section: Resultsmentioning

confidence: 99%

Anticorrosion and electromagnetic interference shielding behavior of candle soot‐based epoxy coating

Chauhan

J of Applied Polymer Sci

et al. 2019

“…One of the most common approaches is to grafting other nano hydrophobic particles on it. The advantage of this method is that it could increase the layer spacing, making GO turn into the loose state as well as preserve the properties of GO [29,30]. Furthermore, the grafted nano-particle would also enhance the coating performance because of its characteristics.…”

Section: Introductionmentioning

confidence: 99%

Using 3-Isocyanatopropyltrimethoxysilane to Decorate Graphene Oxide with Nano-Titanium Dioxide for Enhancing the Anti-Corrosion Properties of Epoxy Coating

Song

Zhang

et al. 2020

Polymers

In this paper, the graphene oxide loaded with nano titanium dioxide (TiO2–GO) was synthesized through 3-isocyanatopropyltrimethoxysilane (IPTMS) and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and dispersion test. The results illustrated our modification was successful and TiO2–GO was transferred from hydrophilic to hydrophobic. That greatly enhanced the dispersity of TiO2–GO in epoxy through the observation of the coating morphology test. Moreover, the impact of TiO2–GO on anti-corrosion property in epoxy was investigated by Electrochemical Impedance Spectroscopy (EIS). Comparing to pristine particles including GO and TiO2, TiO2–GO could more significantly improve the resistance of corrosion with the help of IPTMS. Furthermore, the anti-corrosion mechanism of TiO2–GO in epoxy was tentatively proposed and discussed.

“…However, many reports showed that nontoxic nanomaterials as fillers are the key to polish up the resistance of epoxy coating due to their small size, high surface area and high barrier properties [8]. Several papers have reported anticorrosion performance of epoxy resins were enhanced by adding small amount of nanoparticles, such as TiO 2 [9], SiO 2 [10], etc. Meso-TiO 2 not only has nanoscale size, but also has the unique pore structure compared with normal nanoparticles which could improve the anti-aging properties and barrier properties of the coating.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Waterborne Epoxy Coatings by Incorporation of Dopamine Treated Mesoporous-TiO2 Particles

et al. 2018

Abstract:In this paper, waterborne epoxy (EP) coatings were modified by the incorporation of synthetic structure (DA/meso-TiO 2 ) to improve the anticorrosion ability of waterborne epoxy coatings for steel structures. Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption-desorption, X-ray diffraction (XRD) and thermo-gravimetric analyses (TGA) were used to characterize textural properties of DA/meso-TiO 2 . Corrosion performances of mild carbon steel coated samples were tested by salt spray tests and employing electrochemical impedance spectroscopy (EIS). FTIR, XRD, TGA and nitrogen adsorption-desorption attested to dopamine polymerization within the mesopores and on the surface of meso-TiO 2 . The results of EIS and salt spray test showed that the specimen coated with 1.0 wt % DA/meso-TiO 2 exhibited optimum corrosion performance among other coating specimens.