Characterization and corrosion protection of nano-titanium dioxide doped BTSE-GPTMS sol–gel coating on cast Al–Si alloy

Huang, Xianfu; Ke, Rui; Dong, Yong

doi:10.1007/s10971-019-05211-z

Cited by 17 publications

(13 citation statements)

References 49 publications

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“…This is due to the exposure of bare AA7055 aluminum alloy surface through pores/defects in the PU coating. Hence, the EIS investigation of the PU‐BAPOD/Si 3 N 4 coated AA7055 alloy showed the superior anticorrosive behavior, even after prolonged exposure to chloride environment in comparison with PU coated AA7055 aluminum alloy 36,37 …”

Section: Resultsmentioning

confidence: 95%

“…Hence, the EIS investigation of the PU-BAPOD/Si 3 N 4 coated AA7055 alloy showed the superior anticorrosive behavior, even after prolonged exposure to chloride environment in comparison with PU coated AA7055 aluminum alloy. 36,37 The corrosive ions could easily penetrate into the aluminum alloy specimens and forms more corrosion products compared with coated specimens. Whereas, the E corr and i corr values of pure PU coated aluminum alloy at 1 day are found to be À445 mV and 6.20 μA/cm 2 .…”

Section: Eis Measurementmentioning

confidence: 99%

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RETRACTED: Effects of newly synthesized nanocomposites containing multifunctionalized silicon nitride nanoparticles: A study on structural, thermal, electrochemical, mechanical, morphological, water repellent properties for aerospace components

Xavier

2022

J of Applied Polymer Sci

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The silicon nitride (Si 3 N 4 ) nanoparticles modified by 2,5-Bis-(4-aminophenyl)-1,3,4-oxadiazole (BAPOD) investigated by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy, thermogravimetry (TGA), X-ray diffraction (XRD), and atomic force microscopy (AFM) were reinforced with polyurethane (PU). The newly synthesized formulations such as PU-Si 3 N 4 , PU-BAPOD, and PU-BAPOD/ Si 3 N 4 nanocomposite coated AA7055 aluminum alloy were electrochemically studied by scanning electrochemical microscopy (SECM), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) for their anticorrosion behaviors and compared with pure PU coating. EIS studies revealed excellent protection behavior for the PU-BAPOD/Si 3 N 4 coated AA7055 aluminum alloy in 3.5% NaCl solution. The coating resistance of PU-BAPOD/ Si 3 N 4 nanocomposite was found to be 5995.23 kΩ.cm 2 whereas lower coating resistance was observed for the pure PU coating (141.24 kΩ.cm 2 ). It is found that the coating resistance of PU-BAPOD/Si 3 N 4 nanocomposite is over 42% higher than that of the PU. The measured current for aluminum ions by SECM investigation over the EP-BAPOD/Si 3 N 4 nanocomposite coating was very low (1.6 nA) compared with PU-Si 3 N 4 (7.6 nA) and pure PU coated AA7055 (14.9 nA). The surface morphological studies of the coated AA7055 by SEM/EDX analysis and XRD analysis revealed that the Si 3 N 4 nanoparticles were enriched at the corrosion products which prevented corrosion initiation processes. The enhanced mechanical properties were noticed by mechanical analysis for the PU-BAPOD/Si 3 N 4 nanocomposite coating when the concentration of nanoparticles was 2 wt%. However, there was a decrease in their mechanical properties beyond 2 wt% due to the aggregation of nanoparticles in the PU coated specimen. The results showed that the newly developed PU-BAPOD/Si 3 N 4 nanocomposite coating possessed superior corrosion protection and enhanced hydrophobic behaviors (WCA: 149 ). Therefore, it was concluded that the newly synthesized PU-BAPOD/Si 3 N 4 nanocomposite provided excellent

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Section: Resultsmentioning

confidence: 95%

Section: Eis Measurementmentioning

confidence: 99%

RETRACTED: Effects of newly synthesized nanocomposites containing multifunctionalized silicon nitride nanoparticles: A study on structural, thermal, electrochemical, mechanical, morphological, water repellent properties for aerospace components

Xavier

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…Generally, the larger the dimension of the capacitive loop, the higher the impedance value, indicating that the coating has better corrosion resistance. [25,26] The diameter of the Nyquist plots of the hybrid AP coating is larger than that of the unhybridized AP coating, indicating that the hybrid AP coating has a better shielding effect on corrosive media and can better protect the substrate.…”

Section: Corrosion Studies Of Coatingsmentioning

confidence: 99%

Effect of hybrid aluminum dihydrogen phosphate on the corrosion resistance of PTFE composite ceramic coatings

Wang

Bian

Liu

et al. 2021

Materials & Corrosion

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In this study, the polytetrafluoroethylene (PTFE) composite ceramic coatings with hybrid aluminum dihydrogen phosphate (AP) are prepared on AISI 304L stainless steel by spraying and heat curing to improve the corrosion resistance of the coatings. AP is hybridized with methyltriethoxysilane (MTES), and the structure of the hybrid AP is characterized by Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. Contact angle tests, scratch tests, and electrochemical experiments are used to investigate the corrosion behavior of composite ceramic coatings.

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“…Generally, the radius of the Nyquist diagram represents corrosion resistance and the larger the radius, the smaller the corrosion rate. [ 16,17 ] The capacitor loops of the coatings are larger than AISI 304 stainless steel, indicating that the presence of the coating improves the corrosion resistance. Compared with PTFE coating, PF coating has an increase in the radius of the capacitor loop, indicating that the addition of FAS effectively improves the corrosion resistance of the coating.…”

Section: Resultsmentioning

confidence: 99%

Preparation of self‐healing hydrophobic coating and its anticorrosion property

Wang

et al. 2022

Polymer Engineering & Sci

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In this study, a composite coating of polytetrafluoroethylene (PTFE) and fluorinated alkyl silane (FAS, C 16 H 19 F 17 O 3 Si) is prepared on AISI 304 L stainless steel. Scanning electron microscope and X-ray photoelectron spectroscopy are used to analyze the microstructure and chemical group changes of PTFE-FAS coating (PF coating) before and after sulfuric acid (H 2 SO 4 ) corrosion and after heat treatment. In addition, differential scanning calorimeter is performed to study the thermodynamic properties of PF coating. The corrosion resistance of PF coating under the above conditions is tested by the electrochemical experiment. The results show that acid and abrasion treatments can reduce the hydrophobic properties of the coatings, and the damage caused by acid is more serious. Heat treatment can repair the hydrophobic properties of the coating damaged by acid and abrasion. In addition, PF coating has an excellent corrosion resistance, but after H 2 SO 4 treatment, the protection efficiency (PE) decreases from 89.09% to 2.51%, indicating that the corrosion resistance of PF is severely damaged. However, PE of PF coating increases to 76.83% after heat treatment. This repair ability improves the corrosion resistance of the coating. At the same time, the related mechanism is also clarified.

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Characterization and corrosion protection of nano-titanium dioxide doped BTSE-GPTMS sol–gel coating on cast Al–Si alloy

Cited by 17 publications

References 49 publications

RETRACTED: Effects of newly synthesized nanocomposites containing multifunctionalized silicon nitride nanoparticles: A study on structural, thermal, electrochemical, mechanical, morphological, water repellent properties for aerospace components

RETRACTED: Effects of newly synthesized nanocomposites containing multifunctionalized silicon nitride nanoparticles: A study on structural, thermal, electrochemical, mechanical, morphological, water repellent properties for aerospace components

Effect of hybrid aluminum dihydrogen phosphate on the corrosion resistance of PTFE composite ceramic coatings

Preparation of self‐healing hydrophobic coating and its anticorrosion property

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