Improving the Water Barrier and Anticorrosion Performances of Epoxy-Chitosan Coatings via Silane Modification

Arukalam, Innocent O.; Timothy, U. J.; Madu, Izuchukwu O.; Achor, Joseph O.

doi:10.1007/s40735-021-00512-9

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…Despite the remarkable anticorrosion properties of epoxy coating and chitosan-modi ed epoxy coating already reported in the literature [17,18], recent experiments [3,19,20] aimed at improving the surface properties of epoxy coatings suggest that silanization of epoxy coatings holds great prospects for robust anticorrosion performance. Thus, each of tetraethoxysilane (TEOS)-modi ed chitosan nanocluster and (3aminopropyl ethoxy) silane (AMPTES)-modi ed chitosan nanocluster was added to epoxy coating to enhance the surface properties of epoxy coating for better anticorrosion performance.…”

Section: Molecular Dynamics (Md) Simulationmentioning

confidence: 99%

Investigating the effect of silane modification of chitosan on the anticorrosion performance of epoxy primer coating using computational simulation technique

Uzochukwu

Arukalam

Njoku

2022

Preprint

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The anticorrosion performance of silane-modified chitosan/epoxy primer coatings was evaluated using quantum chemical computations and molecular dynamics simulation. The coating formulation was based on diglycidyl ether of bisphenol A (DGEBA) epoxy cured with 1,3- benzenediamine (BDA). Chitosan biopolymer nanoclusters were used as filler, and two different silane additives: tetraethoxysilane and (3- aminopropyl) trimethoxy silane were used as hydrophobic modifiers. Mild steel surface was theoretically constructed, and 3.5 wt. % NaCl solution was simulated to represent seawater (marine water) as corrodent. The objective was to gain insight into the molecular/atomistic level of the coating/metal interface to be able to design high performance anticorrosion epoxy nanocomposite primer coating for marine application. The quantum chemical parameters as well as interactions between the silane-modified chitosan/epoxy coatings and mild steel surface were appraised. Computational results showed that the obtained quantum chemical parameters for the silane-modified chitosan are related to high corrosion protective capability. The adsorption energies (Eads) of the silane-modified chitosan/epoxy coating were observed to be higher than the unsilanized chitosan/epoxy and plain epoxy coatings. This implies that the silane-modified chitosan/epoxy coating is potentially more corrosion-resistant than the unsilanized chitosan/epoxy and plain epoxy coatings.

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Section: Molecular Dynamics (Md) Simulationmentioning

confidence: 99%

Investigating the effect of silane modification of chitosan on the anticorrosion performance of epoxy primer coating using computational simulation technique

Uzochukwu

Arukalam

Njoku

2022

Preprint

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“…There is a rich scientific literature regarding the investigation of chitosan-and epoxybased coatings; however, these are hybrid systems or composites. For instance, it was observed that the addition of chitosan decreased the tensile strength [19], increased the flexibility [20], improved the hardness of an epoxy composite [21], enhanced the anticorrosion property of epoxy coatings [22], and increased the water absorption of the epoxy-based composite [23]. However, to the best of our knowledge, there are no published data for using them as superposed monolayers formed with dip-coating and specialized for temporary protection during the transport of metals that require further processing or assembly.…”

Section: Introductionmentioning

confidence: 99%

Temporary Anti-Corrosive Double Layer on Zinc Substrate Based on Chitosan Hydrogel and Epoxy Resin

Ovari

Szőke

Katona

et al. 2023

Gels

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In practice, metal structures are frequently transported or stored before being used. Even in such circumstances, the corrosion process caused by environmental factors (moisture, salty air, etc.) can occur quite easily. To avoid this, metal surfaces can be protected with temporary coatings. The objective of this research was to develop coatings that exhibit effective protective characteristics while also allowing for easy removal, if required. Novel, chitosan/epoxy double layers were prepared on zinc by dip-coating to obtain temporary tailor-made and peelable-on-demand, anti-corrosive coatings. Chitosan hydrogel fulfills the role of a primer that acts as an intermediary between the zinc substrate and the epoxy film to obtain better adhesion and specialization. The resulting coatings were characterized using electrochemical impedance spectroscopy, contact angle measurements, Raman spectroscopy, and scanning electron microscopy. The impedance of the bare zinc was increased by three orders of magnitude when the protective coatings were applied, proving efficient anti-corrosive protection. The chitosan sublayer improved the adhesion of the protective epoxy coating. The structural integrity and absolute impedance of the protective layers were conserved in both basic and neutral environments. However, after fulfilling its lifespan, the chitosan/epoxy double-layered coating could be removed after treatment with a mild acid without damaging the substrate. This was because of the hydrophilic properties of the epoxy layer, as well as the tendency of chitosan to swell in acidic conditions.

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“…To achieve this, so many mitigation techniques have been developed and some are still underway. For metallic components deployed for underground oil & gas operations and marine environments, functional anticorrosion coatings have proven to be effective [3][4][5][6]. For optimum performance of the anticorrosion coatings, critical study of coating/metal interface properties are necessary for robust design of effective and durable anticorrosion coatings.…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Anticorrosion performance assessment of silane-modified chitosan/epoxy primer coatings on mild steel in saline environment using computational simulation techniques

2023

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The anticorrosion performance of silane-modi ed chitosan/epoxy primer coatings was evaluated using quantum chemical computations and molecular dynamics simulation. The coating formulation was based on diglycidyl ether of bisphenol A (DGEBA) epoxy cured with 1,3benzenediamine (BDA). Chitosan biopolymer nanoclusters were used as ller, and two different silane additives: tetraethoxysilane and (3aminopropyl) trimethoxy silane were used as hydrophobic modi ers. Mild steel surface was theoretically constructed, and 3.5 wt. % NaCl solution was simulated to represent seawater (marine water) as corrodent. The objective was to gain insight into the molecular/atomistic level of the coating/metal interface to be able to design high performance anticorrosion epoxy nanocomposite primer coating for marine application. The quantum chemical parameters as well as interactions between the silane-modi ed chitosan/epoxy coatings and mild steel surface were appraised. Computational results showed that the obtained quantum chemical parameters for the silane-modi ed chitosan are related to high corrosion protective capability. The adsorption energies (E ads ) of the silane-modi ed chitosan/epoxy coating were observed to be higher than the unsilanized chitosan/epoxy and plain epoxy coatings. This implies that the silane-modi ed chitosan/epoxy coating is potentially more corrosion-resistant than the unsilanized chitosan/epoxy and plain epoxy coatings.

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Improving the Water Barrier and Anticorrosion Performances of Epoxy-Chitosan Coatings via Silane Modification

Cited by 9 publications

References 37 publications

Investigating the effect of silane modification of chitosan on the anticorrosion performance of epoxy primer coating using computational simulation technique

Investigating the effect of silane modification of chitosan on the anticorrosion performance of epoxy primer coating using computational simulation technique

Temporary Anti-Corrosive Double Layer on Zinc Substrate Based on Chitosan Hydrogel and Epoxy Resin

Anticorrosion performance assessment of silane-modified chitosan/epoxy primer coatings on mild steel in saline environment using computational simulation techniques

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