Anticorrosive property of hexafunctional epoxy polymer HGTMDAE for E24 carbon steel corrosion in 1.0 M HCl: gravimetric, electrochemical, surface morphology and molecular dynamic simulations

Hsissou, Rachid; Benzidia, Bouchra; Rehioui, Malak; Berradi, Mohamed; Berisha, Avni; Assouag, M.; Hajjaji, Najat

doi:10.1007/s00289-019-02934-5

Cited by 93 publications

(40 citation statements)

References 55 publications

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“…Recently several researches have been performed on the corrosion inhibition including synthetic inhibitors [ 3 , 4 , 5 , 6 ] and green inhibitors [ 7 , 8 , 9 , 10 ]. In fact, green inhibitors are in urgent need of development because they are environment-friendly, safe and biodegradable.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibiting effect of a green formulation based on Opuntia Dillenii seed oil for iron in acid rain solution

Rehioui

Abbout

Benzidia

et al. 2021

Heliyon

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This study examines the development of a new green and eco-friendly formulation derived from Opuntia dillenii seed oil (labeled as FOD) and its application as a corrosion inhibitor to protect iron which is subject to corrosion phenomena that become important especially in acidic environments as acid rain. Physicochemical properties and fatty acid analysis of Opuntia dillenii seed oil were performed and they demonstrated that the oil is a major source of unsaturated fatty acids, in particular linoleic acid, with a percentage of 73.388%. Corrosion inhibition effect of FOD was studied by gravimetric methods, electrochemical measurements, and scanning electron microscopy coupled with elemental analysis (SEM/EDX). Obtained results confirmed that FOD behaves as a good mixed corrosion inhibitor with predominant anodic activity. Inhibition efficiency of FOD is more important when the concentration of FOD and the immersion time increase, reaching values up to 99%. FOD forms a barrier layer on the surface of the iron, and thereby minimizes the contact area between the metal surface and the corrosive solution. The adsorption behavior of FOD on iron surface obeys Langmuir adsorption isotherm with chemisorption and physisorption mechanism.

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Section: Introductionmentioning

confidence: 99%

Corrosion inhibiting effect of a green formulation based on Opuntia Dillenii seed oil for iron in acid rain solution

Rehioui

Abbout

Benzidia

et al. 2021

Heliyon

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“…The interaction of the OPD and PPD onto the Ni–W surface gives a mean to evaluate the required energies for this adsorption. The quantitative adsorption energy ( E ads ) is calculated by using Equation ): [28, 30, 49, 50]

E_{adsorption} = E_{Ni - normalW ((), 110) CPQorMPQ} - ((), Ni - W_{(110)} + E_{OPDorPPD})

where Ni − W(110) OPD or PPD is the total energy of the simulated corrosion system, E Ni–W, and E OPD or PPD is the total energy of the Ni–W (110) surface and free inhibitor.…”

Section: Resultsmentioning

confidence: 99%

Salen type additives as corrosion mitigator for Ni–W alloys: Detailed electronic/atomic‐scale computational illustration

Uppalapati

Berisha

Velmurugan

et al. 2020

Int J of Quantum Chemistry

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It is imperative to study the long‐term corrosion problems of nickel alloys in acidic medium due to breakdown of their passive oxide film. Focus of this work is to enhance the knowledge of adsorption of organic additives ‐1‐((E)‐(2‐((E)‐(2‐hydroxynaphthalen‐1‐yl)methyleneamino)phenylimino)methyl)naphthalen‐2‐ol (OPD) and 1‐((E)‐(2‐((E)‐(2‐hydroxynaphthalen‐1‐yl)methyleneamino)phenylimino)methyl)naphthalen‐2‐ol (PPD) onto the surface of Ni–W alloy. Deducing the scenario of competitive adsorption of salen‐type symmetrical Schiff bases (OPD and PPD) as additive molecules on Ni–W alloy surface at molecular level was studied by density functional theory (DFT), Monte Carlo simulation (MC), molecular dynamics simulation (MD) and radial distribution function (RDF) analysis. Obtained intrinsic molecular parameters from DFT shows a strong conformity to the corrosion efficiencies of experimental results. From the simulation results, PPD showed the higher polarization (650.707 a.u.), higher binding energy (Ebinding = 1132.241 kJ/mol), larger negative interaction energy (Einteraction = −1132.241 kcal/mol), and negative value of adsorption energy (Eadsorption = −195.55 kcal/mol) and flat‐lying spatial orientation than that of OPD. These results suggested that the role of spacers play a vital role in the adsorption process, that is, larger spacer containing PPD has strong binding interaction and high surface area coverage with Ni–W alloy surface than shorter spacer OPD. Significant findings from DFT global descriptors, MC, MD and RDF analysis ratifies the corrosion efficiencies (PPD > OPD) of experimental outcomes, which correlates positively with the larger isomeric spacer. Overall, the present study, reports offers the corrosion resistance impact of OPD and PPD additives, revealing the fact of PPD as effective one and OPD as moderate ones for Ni–W alloys, thus validating the experimental results.

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“…The different formulations with addition of 0 to 5% of NEPS modified are analyzed by the scanning electron microscopy (SEM). According to SEM micrographs observations, the cementitious matrix formulated by NEPS clearly show the spherical IER loads on the analyzed surfaces 21,22 . The addition of 1% NEPS exhibits better dispersion, this confirms the higher compressive strength.…”

Section: Optimization Of Percentage Of Neps Modifiedmentioning

confidence: 85%

Evaluation of Mechanical compressive strength of cementitious matrix with 12% of IER formulated by modified polymer (NEPS) at different percentages

Bekhta

Hsissou

2020

Sci Rep

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During this paper, we improved the compressive strength of cementitious matrix based on ion exchanging resin (IER) at 12% and formulated by the modified novolac epoxy polymer surfactant (NEPS) at various percentages (0, 1, 2, 3, 4 and 5%). The results show that the introduction of 1% and 2% of NEPS in the cementitious matrix with 12% of IER increases the compressive strength compared to that of the basic matrix (from 7 to 90 days). However, the formulations 3, 4 and 5% show the compressive strength is less than that of the basic matrix (from 28 to 90 days). Epoxy polymers cover various industrial areas such as: electronics, coating, inhibition, space construction and radioactive waste 1-5. Epoxy polymers have many properties, including viscosimetric, thermal, morphological, rheological and mechanical compressive of strength 6-9. At this time, the most widely employed process for the synthesis of epoxy polymers is the condensation of epichlorohydrin on structures having at least two mobile hydrogen atoms such as diamines, diacids and polyphenols. Also, the oxidation of polyunsaturated compounds and/or the condensation of glycidol with halogenated compounds 10,11. Novolac epoxy polymers are obtained by the condensation of phenol with formaldehyde in an acid medium 12,13. The objective of this paper is to improve the chemical compressive of strength of the cementitious matrix based on ion exchanging resin (IER) at 12% formulated by novolac epoxy polymer surfactant (NEPS) modified at various percentages (1, 2, 3, 4 and 5%) 14-16. We have studied the properties of mechanical of compressive strength, varying the polymer amounts incorporated in cementitious matrix formulations. This gave us the reflection to introduce the modified novolac epoxy polymer in surfactant form into the cementitious matrix. Besides, the results obtained show an increase in mechanical compressive of strength after 7, 14, 28 and 90 days of confinement compared to the basic matrix. Material and Methods Ion exchange resin (IER). Ion exchange resin is a crosslinked macromolecular water insoluble matrix which, upon contact with a solution, can exchange the ions it contains with other ions of the same sign from the solution used in water purification of the reactor vessel Mark TRIGA II 16. Their physicochemical properties are shown in Table 1. Novolac epoxy polymer (NEP). Epoxies are excellent matrices of high performance polymers. The latter are synthesized by polycondensation reaction and are used in several fields such as conditioning of radioactive

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Anticorrosive property of hexafunctional epoxy polymer HGTMDAE for E24 carbon steel corrosion in 1.0 M HCl: gravimetric, electrochemical, surface morphology and molecular dynamic simulations

Cited by 93 publications

References 55 publications

Corrosion inhibiting effect of a green formulation based on Opuntia Dillenii seed oil for iron in acid rain solution

Corrosion inhibiting effect of a green formulation based on Opuntia Dillenii seed oil for iron in acid rain solution

Salen type additives as corrosion mitigator for Ni–W alloys: Detailed electronic/atomic‐scale computational illustration

Evaluation of Mechanical compressive strength of cementitious matrix with 12% of IER formulated by modified polymer (NEPS) at different percentages

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