Epoxy resins as anticorrosive polymeric materials: A review

Verma, Chandrabhan; Olasunkanmi, Lukman O.; Akpan, Ekemini D.; Quraishi, M.A.; Dagdag, Omar; Gouri, M. El; Sherif, El‐Sayed M.; Ebenso, Eno E.

doi:10.1016/j.reactfunctpolym.2020.104741

Cited by 210 publications

(95 citation statements)

References 101 publications

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“…The development of an organic coating requires compatibility with specific environmental regulations and safety concerns [ 7 ]; the coating’s molecular structure is modified in some cases to meet new expectations [ 8 , 9 , 10 ]. For instance, the peripheral polar functional groups in the epoxy act as adsorption sites for inhibitors (e.g., amines, thiols, and alcohol-based epoxy resins), which enhances its anticorrosive effects in aqueous media when applied as a coating [ 11 ]. In addition to the main macromolecular compound, organic and inorganic additive components can be used to improve the anticorrosive performance of the coating [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings

Zargarnezhad

Asselin

Wong³

et al. 2021

Polymers

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The barrier performance of organic coatings is a direct function of mass transport and long-term stability of the polymeric structure. A predictive assessment of the protective coating cannot be conducted a priori of degradation effects on transport. Epoxy-based powder coatings are an attractive class of coatings for pipelines and other structures because application processing times are low and residual stresses between polymer layers are reduced. However, water ingress into the polymeric network of these coatings is of particular interest due to associated competitive sorption and plasticization effects. This review examines common analytical techniques for identifying parameters involved in transport in wet environments and underscores the gaps in the literature for the evaluation of the long-term performance of such coating systems. Studies have shown that the extent of polymer hydration has a major impact on gas and ion permeability/selectivity. Thus, transport analyses based only on micropore filling (i.e., adsorption) by water molecules are inadequate. Combinatorial entropy of the glassy epoxy and water vapor mixture not only affects the mechanism of membrane plasticization, but also changes the sorption kinetics of gas permeation and causes a partial gas immobility in the system. However, diffusivity, defined as the product of a kinetic mobility parameter and a concentration-dependent thermodynamic parameter, can eventually become favorable for gas transport at elevated temperatures, meaning that increasing gas pressure can decrease selectivity of the membrane for gas permeation. On the other hand, reverse osmosis membranes have shown that salt permeation is sensitive to, among other variables, water content in the polymer and a fundamental attribute in ionic diffusion is the effective size of hydrated ions. In addition, external electron sources—e.g., cathodic protection potentials for pipeline structures—can alter the kinetics of this transport as the tendency of ions to dissociate increases due to electrostatic forces. Focusing primarily on epoxy-based powder coatings, this review demonstrates that service parameters such as humidity, temperature, and concentration of aggressive species can dynamically develop different transport mechanisms, each at the expense of others. Although multilayered coating systems decrease moisture ingress and the consequences of environmental exposure, this survey shows that demands for extreme operating conditions can pose new challenges for coating materials and sparse data on transport properties would limit analysis of the remaining life of the system. This knowledge gap impedes the prediction of the likelihood of coating and, consequently, infrastructure failures.

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Section: Introductionmentioning

confidence: 99%

A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings

Zargarnezhad

Asselin

Wong³

et al. 2021

Polymers

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“…Епоксидні полімери (ЕП), які характеризуються високою термостійкістю, значною адгезією до різних матеріалів (металів, скла, кераміки тощо), широко використовуються як клеї, антикорозійні покриття, герметики, та є перспективними як полімерні матриці для приготування інноваційних НК [8,9].…”

Section: вступunclassified

Structure, thermophysical properties and electrical conductivity of nanocomposites based on epoxy polymer and carbon tubes

Korskanov

Fesenko

Dolgoshey

2021

CSL

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The aim of this work was to find the optimal conditions for the formation of nanocomposites, study their structure and properties and conditions for the formation of multicomponent materials based on epoxy polymers and carbon nanotubes with predetermined performance properties. The basis for the formation of epoxy polymers was an epoxydian oligomer (EDO) based on bisphenol A. Polypox H354 was used as a hardener for EDO. Carbon nanotubes (CNT) were used as a nanofiller for the preparation of nanocomposites. The research methods were a diffractometer for measuring the intensity of X-ray scattering in the region of small angles and a differential scanning calorimeter for obtaining heating thermograms. The electrical conductivity of the samples at a temperature of 293 K was measured at direct current according to the two-electrode scheme. In this work the structure, thermophysical properties and electrical conductivity of nanocomposites based epoxy polymers and carbon nanotubes have been studied. It was found that at low CNT content the formation of nanocomposites occurs by the mechanism of epoxy network growth, which is accompanied by the displacement of CNT particles to the periphery of the epoxy matrix. This process is accompanied by an increase in the scattering intensity of the SAXS, a rapid increase in the glass transition temperature and the degree of crosslinking of the epoxy polymer. When the critical concentration is reached, CNT particles form a continuous cluster, which leads to occurrence percolation threshold, reducing the glass transition temperature, expanding the glass transition range, occurrence of pores and reducing the degree of completion of the crosslinking reaction in nanocomposites relative to the epoxy polymer. It is established that the improvement of nanocomposite properties and the occurrence of the percolation threshold is due to the maximum specific energy of ER-CNT interaction and is achieved at a critical mass concentration of nanofiller from 0,1% to 0,4%.

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“…Corrosion process imposes heavy losses to a number of vital industries [automotive, structural engineering, aerospace, oil and gas (energy), etc.] [1][2][3][4][5]. In order to limit the magnitude of this process the use of corrosion inhibitors remains the simplest and the most efficient approach [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…In this sense a huge portfolio of different molecules are exploited to decrease the corrosion rate of materials. This portfolio includes molecules and materials such as: amino acids [10], triazoles [11], ionic liquids [12], triazines [13], green inhibitor molecules [6] [14], polymeric materials [2], purine derivatives [15], quinoxaline derivatives [15], imidazoles [16], quinoline and its derivatives [17], functional and smart coatings [18] [19], natural productsplant extracts [20,21], expired drugs [22], nanomaterials [23,24], etc.…”

Section: Introductionmentioning

confidence: 99%

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Ab Inito Exploration of Nanocars as Potential Corrosion Inhibitors

Berisha¹

2021

Preprint

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<p>With the intent to search for new unexplored potential inhibitors – a series of newly synthesized NanoCars possessing a permanent dipole moment that makes them able for a controlled surface movements (by electric field gradient from a scanning probe microscopy tip) are ab initio explored as corrosion inhibitors. The adsorption of the NanoCars onto Fe (1 1 0) surface was assessed using Density Functional Theory (DFT), Monte Carlo simulation (MC), Molecular Dynamics simulation (MD). The acquired results offered molecular level details in relation to the adsorption ability, adsorption centers, geometry and adsorption energetics of NanoCars onto the Fe(1 1 0) interface. </p>

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Epoxy resins as anticorrosive polymeric materials: A review

Cited by 210 publications

References 101 publications

A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings

A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings

Structure, thermophysical properties and electrical conductivity of nanocomposites based on epoxy polymer and carbon tubes

Ab Inito Exploration of Nanocars as Potential Corrosion Inhibitors

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