An evaluation of the anticorrosion properties of the spinel nanopigment-filled epoxy composite coatings applied on the steel surface

Palimi, M.J.; Peymannia, Masoud; Ramezanzadeh, Bahram

doi:10.1016/j.porgcoat.2014.12.003

Cited by 28 publications

(9 citation statements)

References 32 publications

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“…Another fundamental parameter of the Bode diagrams is capacitor and resistance areas. Increasing the size of capacitor area and decreasing resistance area (trade‐off) revealed some important points: (i) more effective prevention of electrolyte penetration into the coating film, (ii) increasing the durability of the coating film, and (iii) preventing access of corrosive media to the substrate surface . A further significant parameter of Bode diagrams is failure frequency.…”

Section: Resultsmentioning

confidence: 99%

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Oliaee

Naghibi

2017

Int J Applied Ceramic Tech

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Metal surface protection by means of nanostructured ceramic coatings is considered an issue, which is variously scrutinized, and more efforts are made to improve steel performance in accordance with this method. In this respect, this study sought to examine the protective effects of a nanostructured coating containing TiO2 and Al2O3. The optimization approach for obtaining a coating without any cracks with the highest efficiency of corrosion resistance is reported. The variables under assessment were as follows: weight ratio of the oxides, calcination temperature, and preparation parameters. The synthesized samples were analyzed utilizing XRD, FESEM, AFM, Tafel test, EIS, and microhardness measurement. The results revealed that the optimized conditions were as follows: (i) Ti:Al precursor mixture with a weight ratio of 75:25, (ii) heat treatment at 1000°C. This process yielded a uniform composite coating without any cracks with 5.1 nm roughness, containing crystalline rutile phase and amorphous alumina. Not only the intended coating improves the corrosion resistance of steel up to 97%, but it also increases its surface hardness up to 10 units.

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Section: Resultsmentioning

confidence: 99%

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Oliaee

Naghibi

2017

Int J Applied Ceramic Tech

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“…Capacitive and resistance areas were considered as the other observed parameters in bode diagrams. Increasing the size of the capacitive area and decreasing the size of the resistance area indicated the better barrier properties of the coating toward electrolyte entrance, the corrosive factors, and their reaching the surface of the metal . Another considerable parameter was frequency failure in which the capacitive area was converted to the resistance area.…”

Section: Resultsmentioning

confidence: 99%

“…The capacitance element was pertained to the coating to the extent of microfarad related to the nature of the coating density. The presence of coating caused to increase the impedance and reduce the capacitance element related to the corrosion reactions and the charge transfer at the interface showing the improvement of corrosion resistance …”

Section: Resultsmentioning

confidence: 99%

“…Increasing the size of the capacitive area and decreasing the size of the resistance area indicated the better barrier properties of the coating toward electrolyte entrance, the corrosive factors, and their reaching the surface of the metal. 20 Another considerable parameter was frequency failure in which the capacitive area was converted to the resistance area. If the intersection of these two curves inclines to lesser value, the less microscopic separation of the coating from the surface of the metal 21 was to be considered.…”

Section: Corrosion Behaviormentioning

confidence: 99%

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Potency of commercial TiO₂‐P25 nanoparticles to form stainless steel protective coating

Pourmoalem

Naghibi

2017

Int J Applied Ceramic Tech

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This research reports for the first time the surface coating of steel samples with commercial nanoparticles of TiO2. Aiming to improve the substrate corrosion behavior, a stable suspension containing TiO2‐P25 nanoparticles and polyvinyl alcohol in the water was prepared and the coating was applied on the surface of the substrate via dip‐coating. Heat treatment led to the formation of strong connection between the substrate and the coating film. Scanning electron microscopy and scanning probe microscopy were utilized to scrutinize the samples in terms of topography and microstructure. In addition, the samples corrosion behavior was investigated through Tafel polarization and impedance spectroscopy. The results showed that one‐step of sample dip‐coating in sol or heat treatment at 600°C cannot provide for desirable and appropriate physical circumstances in the thin film. The applied thin film showed the highest corrosion behavior improvement when the sample was coated with two or three films and the heat treatment was carried out at 400°C. In this respect, according to the Tafel curves, the applied coating efficiency was measured to be approximately 90%. The electrochemical impedance spectroscopy results indicated that the reference sample was single‐time constant and the coated sample was double‐time constant. Applying the coating increased impedance, reduced the capacitive element, and diminished the resistance area. All three mentioned factors contributed to the enhancement of corrosion behavior.

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“…14,[21][22][23] Spinel anticorrosive pigments have been developed via doping metal oxide with inhibitive components. [24][25][26][27][28] They showed both barrier and inhibitive actions when embedded in the organic coatings. Therefore, they could significantly enhance the corrosion protection properties of the organic coatings.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

et al. 2015

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The MnAl 2 O 4 and CoAl 2 O 4 nanopigments were synthesized through solution combustion method. The nanopigments extracts in the 3.5 wt% NaCl solution were prepared. Electrochemical impedance spectroscopy (EIS) and linear polarization (LP) techniques were utilized to investigate the corrosion inhibition properties of the pigments in the solutions containing pigments extracts. The epoxy nanocomposites were prepared and applied on the aluminum specimens. EIS and pull-off measurements were performed to characterize the corrosion protection properties of the epoxy nanocomposites. It was revealed that the MnAl 2 O 4 pigment showed higher corrosion inhibition properties than CoAl 2 O 4 in the solution phase. In addition, MnAl 2 O 4 enhanced the corrosion resistance and decreased the adhesion loss of the epoxy coating on the aluminum substrate significantly. The MnAl 2 O 4 nanopigment improved the corrosion resistance of the epoxy coating through increasing the barrier performance and releasing inhibitive species.

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An evaluation of the anticorrosion properties of the spinel nanopigment-filled epoxy composite coatings applied on the steel surface

Cited by 28 publications

References 32 publications

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Potency of commercial TiO₂‐P25 nanoparticles to form stainless steel protective coating

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

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An evaluation of the anticorrosion properties of the spinel nanopigment-filled epoxy composite coatings applied on the steel surface

Cited by 28 publications

References 32 publications

Anticorrosion assessment of Al2O3‐TiO2 composite thin films derived from sol‐gel dipping technique

Anticorrosion assessment of Al2O3‐TiO2 composite thin films derived from sol‐gel dipping technique

Potency of commercial TiO2‐P25 nanoparticles to form stainless steel protective coating

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

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Product

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About

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Anticorrosion assessment of Al₂O₃‐TiO₂ composite thin films derived from sol‐gel dipping technique

Potency of commercial TiO₂‐P25 nanoparticles to form stainless steel protective coating