Study the factors affecting the performance of organic–inorganic hybrid coatings

Li, Weili; Dong, Hao; Xing, Xinyu; Tang, Jijun; Xing, Yujin; Li, Xiujuan; Zhang, Jide

doi:10.1002/app.41010

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…Taking C3 as an example, the strong peak at 1091 cm −1 in its IR spectrum is attributed to the formation of SiOSi bonds, which confirms the hydrolysis and polycondensation of the silanol groups. The disappearance of the absorbance peak in the IR spectrum of Epox3 at 913 cm −1 (epoxy bending) confirms epoxy conversion and covalent attachment of Epox3 to the silane group . The absorption peaks at 1548 and 1679 cm −1 correspond to the CN and CO groups of the urethane moiety, respectively.…”

Section: Resultsmentioning

confidence: 82%

Hybrid organosiloxane coatings containing epoxide precursors for protecting mild steel against corrosion in a saline medium

Suleiman

Estaitie

Mizanurahman

2016

J of Applied Polymer Sci

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Hybrid organic-inorganic materials made from sol-gel precursors can be used as anticorrosion barriers on metal substrates. The modification of epoxy resins with silicones is an interesting approach toward the synthesis of hybrid materials that combine the advantages offered by epoxy resins with those of silicones. In this study, novel hybrid epoxy-silicon materials were synthesized using sol-gel chemistry and subsequently functionalized with 4,4 0 -methylenebis(phenyl isocyanate), incorporating urethane functionality into the final polymer. The study screened five different epoxide precursors for use in the synthesis of the new hybrid materials and optimizing their anticorrosion properties. Spectral characterization confirms the proposed chemical structures of the newly synthesized polymers. The newly developed polymers were painted on mild steel panels, thermally cured, and their thermal, surface morphological, adhesion, and anticorrosion properties were fully characterized. The new coatings were found to have excellent thermal stability and adherence properties to steel surface. The results of corrosion testing on coated steel panels following long-term immersion in a 3.5 wt % aqueous NaCl medium revealed that the polymer prepared using the epoxide precursor bisphenol A diglycidyl ether provided the best anticorrosion protection property among the synthesized polymers. This could be attributed to the excellent integrity and crosslink density properties in addition to the lack of microdefects in the surface of this coated sample as confirmed by scanning electron microscopy analyses. The newly prepared hybrid coatings reported in this study are very promising as an alternative to toxic chromate-based coatings.

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Section: Resultsmentioning

confidence: 82%

Hybrid organosiloxane coatings containing epoxide precursors for protecting mild steel against corrosion in a saline medium

Suleiman

Estaitie

Mizanurahman

2016

J of Applied Polymer Sci

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“…This new process was based on the use of amino-silanes as crosslinking agents 3-aminopropyltrimethoxysilane, 3-(2-aminoethyl) aminopropyltrimethoxysilane and 3-(trimethoxysilyl) propyldiethylenetriamine [33]. In a recent work, Li et al have prepared a series of hybrid organic-inorganic coatings based on silica-epoxy composite coatings with the sol-gel method by using the amino-silane 3-aminopropyl triethoxysilane as a coupling agent and tetraethoxysilane to afford chemical bonding to form silica networks organic-inorganic hybrid coatings [34].…”

Section: Introductionmentioning

confidence: 99%

Native Oxide Films on AZ31 and AZ61 Commercial Magnesium Alloys – Corrosion Behaviour, Effect on Isothermal Oxidation and Sol–gel Thin Film Formation

Feliú¹,

hadad²,

Barranco³

et al. 2015

New Trends in Alloy Development, Characterization and Application

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The authors present a review of their recent research work in an endeavour to interpret the influence of native oxide films on the corrosion behaviour of commercial AZ31 and AZ61 magnesium alloys or on the oxidation kinetics in air at 200°C. The tendency of some of these thin films to be sufficiently protective in mild or weak corrosive environments is examined. For obtaining oxide films with different protective properties, some of the specimens are tested with the surface in the as-received condition, while others are tested immediately after mechanical polishing. The technique applied to characterise thin (thickness of just a few nanometres) oxide films present on the surface of alloys has basically been XPS (X-ray photoelectron spectroscopy) in combination with ion sputtering. Oxidation resistance of the alloys is quantified by thermo gravimetric (TG) curves and their corrosion rate is evaluated by Electrochemical Impedance Spectroscopy (EIS) and hydrogen evolution measurement in chloride solutions with different aggressivity. Emphasis is placed on the possible effects of: (a) the different thickness of the native oxide films formed on the polished surfaces on the corrosion behaviour of the alloys; and (b) the different film homogeneity and uniformity on the oxidation results. Finally, an attempt will be made to learn more about the influence of the native oxide films that cover the substrate on the subsequent growth and protective behaviour of the sol-gel coatings.

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“…A slight wrinkle might be caused by the shrinkage of polymer chains during the process of the sol-gel reaction. 22 Due to a high chemical-bond energy (Si-O-Si, 422.5 kJ mol −1 ), it requires more energy to destroy the PDMS-based elastomer. 23 From Fig.…”

Section: Resultsmentioning

confidence: 99%

A novel stimuli-responsive fluorescent elastomer based on an AIE mechanism

Dong

Wang

et al. 2015

Polym. Chem.

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Study the factors affecting the performance of organic–inorganic hybrid coatings

Cited by 15 publications

References 32 publications

Hybrid organosiloxane coatings containing epoxide precursors for protecting mild steel against corrosion in a saline medium

Hybrid organosiloxane coatings containing epoxide precursors for protecting mild steel against corrosion in a saline medium

Native Oxide Films on AZ31 and AZ61 Commercial Magnesium Alloys – Corrosion Behaviour, Effect on Isothermal Oxidation and Sol–gel Thin Film Formation

A novel stimuli-responsive fluorescent elastomer based on an AIE mechanism

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