Application of EIS and SECM Studies for Investigation of Anticorrosion Properties of Epoxy Coatings Containing Zinc Oxide Nanoparticles on Mild Steel in 3.5% NaCl Solution

Raj, X. Joseph

doi:10.1007/s11665-017-2770-z

Cited by 33 publications

(6 citation statements)

References 21 publications

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“…The electrochemical activity is enhanced at the polyurethane coating‐steel interface due to the direct exposure of the steel to the electrolyte via defects/pores in the coated system. However, the electrochemical activity is completely reduced at the PU‐ATAT/SiO 2 −TiO 2 nanocomposite coating‐steel interface as the pores and defects are covered with the nano ATAT/SiO 2 −TiO 2 particles which enhance the anti‐corrosive behaviour [31–35] . The results obtained from the polarization experiments compliment the results obtained from the EIS studies.…”

Section: Resultssupporting

confidence: 77%

“…However, the electrochemical activity is completely reduced at the PU-ATAT/SiO 2 À TiO 2 nanocomposite coating-steel interface as the pores and defects are covered with the nano ATAT/SiO 2 À TiO 2 particles which enhance the anti-corrosive behaviour. [31][32][33][34][35] The results obtained from the polarization experiments compliment the results obtained from the EIS studies.…”

Section: Chemistryselectsupporting

confidence: 68%

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Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Xavier

2022

ChemistrySelect

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Newly synthesized functional nanoparticles, 3-amino-1, 2, 4triazole-5-thiol (ATAT)/SiO 2 À TiO 2 nanoparticles, investigated by Transmission electron microscopy (TEM), Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/ EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analysis, were added to the polyurethane (PU) matrix. The produced PU-ATAT/SiO 2 À TiO 2 nanocomposite coated steel specimen was studied by Scanning electrochemical microscopy (SECM), potentiodynamic polarization and Electrochemical impedance spectroscopy (EIS) for their barrier properties against corrosion. The coating resistance (R coat ) of the PU-ATAT/SiO 2 À TiO 2 nanocomposite was found to be 2956.90 kΩ.cm 2 . It was found that the coating resistance of PU-ATAT/SiO 2 À TiO 2 nanocomposite coating was over 50 % higher than that of the PU coating. The current measured along the scratched surface of the PU-ATAT/SiO 2 À TiO 2 nanocomposite coating was found to be very less (1.65 nA). The degradation products analyzed by SEM/EDX and XRD displayed the enriched ATAT/SiO 2 À TiO 2 nanoparticles which hindered the passage of electrolytes into the interface of coating. The hydrophobic nature of the PU-ATAT/SiO 2 À TiO 2 nanocomposite coating (θ = 115.4°) was confirmed by water contact angle measurement. The least oxygen permeability was observed in the PU-ATAT/SiO 2 À TiO 2 . The improved mechanical properties were found by dynamic mechanical analysis (DMA) for the PU-ATAT/SiO 2 À TiO 2 nanocomposite coating. Therefore, the newly synthesized PU-ATAT/SiO 2 À TiO 2 nanocomposite provided an outstanding barrier and mechanical properties due to the addition of ATAT/SiO 2 À TiO 2 nanoparticles to the polyurethane, which obstructed the degradation of materials and assisted in prolonging the life of the coated steel.

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Section: Resultssupporting

confidence: 77%

Section: Chemistryselectsupporting

confidence: 68%

Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Xavier

2022

ChemistrySelect

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“…From another perspective, the Nyquist plots of the steel samples possessed two relaxation times. The one observed at higher frequencies is attributed to the charge transfer resistance ( R ct ), and the other one at lower frequencies is related to the film formed on the steel surface ( R f ). , The existence of these two relaxation times indicated that the electrochemical reactions were mainly the inhibition of charge transfer and the formation of a protective film on the steel surface. Figure d illustrated the average impedance of epoxy coatings with ZnO, 3FZ, 4CZ, and 4NZ NSSs.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Anticorrosion Performance and Mass Preparation of Magnetic Metal-Doped Zinc Oxide Nano Solid Solutions

Xue

Shen

Zhang

et al. 2018

Ind. Eng. Chem. Res.

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To enhance the limited anticorrosion property of ZnO nanoparticles (NPs), magnetic metal-doped ZnO nano solid solutions (M-ZnO NSSs, M = Fe, Co, Ni) were synthesized by a calcination modification method. Through investigating the electron transfer postponement by magnetic metals and sediment layer obstructing erosion by electrolytes, a synergistic anticorrosion mechanism was concluded. In comparison with ZnO NPs, the impedance of Fe-, Co-, and Ni-doped ZnO NSSs dramatically increased by 757.0%, 1067.4%, and 950.9% after exposure to 3.5 wt % NaCl solution for 72 h, respectively. The mass preparation and charge transfer disturbance of M-ZnO NSSs provide industrial anticorrosion with a new horizon.

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“…The introduction of nano CeO 2 -ZrO 2 particles, which hindered the electrolyte's entrance into the coating-steel interface, significantly reduced the degrading behaviour of PU coatings. The addition of nano CeO 2 -ZrO 2 particles to the polymer reinforced the morphological features of the coated surface, which were free of flaws and pores (Raj, 2017;Xavier, 2018). As a result, the nanocomposite (PU/CeO 2 -ZrO 2 ) coating produced clean and homogeneous by-products made up of complicated oxides of Ce, Fe and Zr, which served to prevent electrolyte migration at the coating-steel interface, reducing coating delamination.…”

Section: Sem/edx Analysismentioning

confidence: 99%

Effect of reinforcement of mixed metal oxide nanoparticles in polyurethane resin for barrier and dynamic mechanical properties of steel structures

Xavier

2022

ACMM

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Purpose This study aims to study the effect of the reinforcement of mixed CeO2-ZrO2 nanoparticles in the polyurethane (PU) for protection properties of steel structures. Design/methodology/approach Electrochemical techniques were used to study the anticorrosion properties of the generated PU/CeO2-ZrO2 nanocomposite coated steel. Dynamic mechanical testing was done to investigate the mechanical properties. Findings In natural seawater, Electrochemical impedance spectroscopy experiments indicated outstanding protective behaviour for the PU/CeO2-ZrO2-coated steel. The coating resistance of the PU/CeO2-ZrO2 nanocomposite coating was found to be roughly 30% greater than that of the PU coating. Scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction analyses of the coated steel surface revealed that the CeO2-ZrO2 was accumulated at the corrosion products, preventing the corrosion. Dynamic mechanical analysis revealed that when the nanoparticle concentration was 3 Wt.%, the PU/CeO2-ZrO2 nanocomposite coating had improved dynamic mechanical parameters. Originality/value The coating resistance of the PU/CeO2-ZrO2 nanocomposite was determined to be 2999.17 kΩ.cm2. The perceived current by scanning electrochemical microscopy analysis across the PU/CeO2-ZrO2 coating was 1.7 nA. The PU/CeO2-ZrO2 nanocomposite had a good hydrophobic behaviour (WCA: 101o). The newly synthesised PU/CeO2-ZrO2 composite offered great barrier and mechanical properties, preventing material degradation and increase the lifespan of the coated steel. Hence, this form of coating could be used as a viable coating material for industrial purposes.

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Application of EIS and SECM Studies for Investigation of Anticorrosion Properties of Epoxy Coatings Containing Zinc Oxide Nanoparticles on Mild Steel in 3.5% NaCl Solution

Cited by 33 publications

References 21 publications

Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Enhanced Anticorrosion Performance and Mass Preparation of Magnetic Metal-Doped Zinc Oxide Nano Solid Solutions

Effect of reinforcement of mixed metal oxide nanoparticles in polyurethane resin for barrier and dynamic mechanical properties of steel structures

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Application of EIS and SECM Studies for Investigation of Anticorrosion Properties of Epoxy Coatings Containing Zinc Oxide Nanoparticles on Mild Steel in 3.5% NaCl Solution

Cited by 33 publications

References 21 publications

Effects of Triazole Functionalized SiO2/TiO2 Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Effects of Triazole Functionalized SiO2/TiO2 Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Enhanced Anticorrosion Performance and Mass Preparation of Magnetic Metal-Doped Zinc Oxide Nano Solid Solutions

Effect of reinforcement of mixed metal oxide nanoparticles in polyurethane resin for barrier and dynamic mechanical properties of steel structures

Contact Info

Product

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Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment

Effects of Triazole Functionalized SiO₂/TiO₂ Nanoparticles in Polyurethane Coating: A Study on Structural, Thermal, Dynamic Mechanical, Morphological and Electrochemical Properties in Marine Environment