The impact of tizanidine on E24 carbon steel corrosion inhibition in oilfield acidizing solution: experimental and quantum chemical studies

Iroha, Nkem B.; Maduelosi, N. J.; Nnanna, Lebe A.

doi:10.1007/s42247-022-00400-z

“…It is also evident from AT-1 and AT-3 alloy that the addition of inhibitor shifted corrosion potential E corr in an anodic direction, indicating that the inhibitor's adsorption was more successful at anodic than cathodic sites 32 . The observed variation in E corr values has been repeatedly reported [33][34][35] . Specifically, if the E corr displacement is greater than 85 mV, the inhibitor would be classified as a cathodic or anodic type inhibitor.…”

Section: Electrochemical Behavior Of Al and Al-ti Alloys In The Absen...supporting

confidence: 68%

The inhibitive action of 2-mercaptobenzothiazole on the porosity of corrosion film formed on aluminum and aluminum–titanium alloys in hydrochloric acid solution

El-Sayed

¹

,

El‐Hendawy

²

,

El-Mahdy

³

et al. 2023

Sci Rep

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Abstract2-Mercaptobenzothiazole (2-MBT) in a solution of 0.5 M HCl is an effective corrosion inhibitor for aluminum and aluminum–titanium alloys. Tafel polarization and electrochemical impedance spectroscopy (EIS) were employed to assess this heterocyclic compound’s anticorrosive potential and complementary by scanning electron microscope (SEM) and calculating porosity percentage in the absence and presence of various inhibitor concentrations. Inhibition efficiency (IE%) was strongly related to concentration (10–6–10–3 M). Temperature’s effect on corrosion behavior was investigated. The data exhibited that the IE% decreases as the temperature increases. An increase in activation energy (Ea) with increasing the inhibitor concentration and the decrease in the IE% value of the mentioned compound with raising the temperature indicates that the inhibitor molecules are adsorbed physically on the surface. Thermodynamic activation parameters for Al and Al–Ti alloy dissolution in both 0.5 M HCl and the inhibited solution were calculated and discussed. According to Langmuir’s adsorption isotherm, the inhibitor molecules were adsorbed. The evaluated standard values of the enthalpy ($$\Delta {H}_{ads.}^{o})$$ Δ H a d s . o ) , entropy ($$\Delta {S}_{ads.}^{o})$$ Δ S a d s . o ) and free energy changes ($$\Delta {G}_{ads.}^{o})$$ Δ G a d s . o ) showed that $$\Delta {H}_{ads.}^{o}$$ Δ H a d s . o and $$\Delta {G}_{ads.}^{o}$$ Δ G a d s . o are negative, while $$\Delta {S}_{ads.}^{o}$$ Δ S a d s . o was positive. The formation of a protective layer adsorbed on the surfaces of the substrates was confirmed with the surface analysis (SEM). The porosity percentage is significantly reduced in the inhibitor presence and gradually decreased with increasing concentration. Furthermore, the density functional theory (DFT) and Monte Carlo (MC) simulations were employed to explain the variance in protecting the Al surface from corrosion. Interestingly, the theoretical findings align with their experimental counterparts. The planarity of 2-MBT and the presence of heteroatoms are the playmakers in the adsorption process.

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“…✓ Nyquist plots show single capacitive loops becoming larger with increasing inhibitor concentration, indicating corrosion resistance increases [35,36] (Figure 5). ✓ Bode plots show phase angle peaks shifting to higher frequencies with inhibitor, suggesting faster electrode kinetics [37,38]. ✓ Equivalent circuit fitting confirms single time constant system and introduction of good insulator of metal surface from the corrosion ions (Figure 7).…”

Section: Eismentioning

confidence: 80%

“…✓ Equivalent circuit fitting confirms single time constant system and introduction of good insulator of metal surface from the corrosion ions (Figure 7). ✓ Rct values increase with HGTMDAP introduction, because, the active sites were effectively blocked with the HGTMDAP [38][39][40]. ✓ θ and ηEIS values >95-96% even at lower concentrations indicate excellent inhibition efficiency of HGTMDAP confirmed by EIS (Table 4).…”

Section: Eismentioning

confidence: 93%

New Hexafunctional Epoxy Prepolymer: Innovation Structure for Corrosion Inhibition

El-Aouni,

Dagdag,

El Amri

et al. 2024

J Bio Tribo Corros

1

0

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This work presents a novel approach to corrosion inhibition through the creation of a groundbreaking hexafunctional phosphorus epoxy resin, namely phosphorus trimethylene dianiline hexaglycidyl (HGTMDAP). This innovative material is synthesized via a two-step process, initiating with a grafting reaction between methylene dianiline and phosphorus trichloride, followed by the addition of epichlorohydrin to yield the hexafunctional resin. The unique structural intricacies of this material were elucidated using advanced microscopic characterization techniques such as FTIR, 1 H, and 13 C NMR. Furthermore, we dove into the exploration of the anticorrosive efficacy of this novel epoxy resin, specifically for metal, leveraging an array of evaluation methods, including EIS, PDP, isothermal adsorption model, thermodynamics, EFM, and the cutting-edge DFT, MC and MD simulations. To explore surface adsorption mechanism of the medium, comprising the metallic material, HGTMDAP resin, and 1.0 M HCl, it was employed sophisticated techniques such as SEM and EDS. This enabled us to decode the surface structure and chemical composition of the sample, providing us with a deeper understanding of the adsorption process and the mechanics of corrosion prevention. Our findings from the electrochemical tests suggest that an increase in the concentration of HGTMDAP significantly enhances protection ability. Interestingly, EIS demonstrated an impressive inhibition efficiency of 96.3% at the optimal concentration (10 -3 M) of HGTMDAP epoxy resin. Polarization results further corroborated that this advanced macromolecular binder serves as a mixed inhibitor. The Langmuir model, which posits that the epoxy resin forms a defender film on the metal surface, was validated in our study. We also utilized kinetic thermodynamic parameter estimation to further evaluate inhibitor adsorption phenomena. Finally, it was ventured into unchartered territory by describing the electronic and adsorption properties of the HGTMDAP epoxy resin using DFT, MC and MD simulations, paving the way for future research in this domain. Through our innovative approach, we have opened up new possibilities in the field of corrosion inhibition.

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“…The utilization of scanning electron microscopy enables the elucidation of surface morphology, thereby providing valuable insights into the composition and structure of surface coatings applied to the mild steel. This investigation ascertains the magnitude of corrosion and its occurrence in the presence and absence of corrosion inhibitors by performing a comprehensive examination of the surface morphology of mild steel through the utilization of SEM images, both in the presence and absence of inhibitor [48,49], to comprehend the characteristics of the coating on the surface with and without EAD inhibitor, and to assess the deterioration of the mild steel. Figure 5a-c depicted the visual representation of the specimen immersed in a solution of HCl with a concentration of 1 M for 2 h, with both the occurrence and non-occurrence of an electrochemical acid dissolution (EAD) inhibitor system.…”

Section: Surface Analysis Of Mild Steel By Semmentioning

confidence: 99%

Experimental Studies on the Effect of Expired Amiodarone Drug (EAD) as a Corrosion Inhibitor on Mild Steel in 1 M HCl

Sheit,

Kani,

Sathiq

et al. 2024

Materials

3

0

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In the present investigation, the corrosion tendency of mild steel under acidic pH was studied by employing unused expired amiodarone (EAD) drug as a potential corrosion inhibitor by adopting the weight loss measurement method. The corrosion inhibition efficiency (IE) of the formed protective film (EAD) on the steel surface was analyzed using potentiodynamic polarization and AC-impedance spectroscopy studies. The surface morphology of the mild steel before and after corrosion (in 1.0 M HCl) was analyzed via scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDAX), atomic force microscopy (AFM), and thermodynamic studies. The weight loss measurement under different concentrations of EAD indicated that an excellent inhibition was displayed at a concentration of 0.001 M, and the IE was found to depend on both the concentration and molecular structure of EAD. A potentiodynamic polarization study revealed that EAD predominantly acted as a cathode inhibitor, and electrochemical impedance spectroscopy (EIS) confirmed the adsorption of EAD on the surface of mild steel, which obeyed Temkin’s adsorption isotherm model. The calculated thermodynamic parameters revealed that adsorption was spontaneous and exothermic.

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The impact of tizanidine on E24 carbon steel corrosion inhibition in oilfield acidizing solution: experimental and quantum chemical studies

Cited by 10 publications

References 53 publications

The inhibitive action of 2-mercaptobenzothiazole on the porosity of corrosion film formed on aluminum and aluminum–titanium alloys in hydrochloric acid solution

The inhibitive action of 2-mercaptobenzothiazole on the porosity of corrosion film formed on aluminum and aluminum–titanium alloys in hydrochloric acid solution

New Hexafunctional Epoxy Prepolymer: Innovation Structure for Corrosion Inhibition

Experimental Studies on the Effect of Expired Amiodarone Drug (EAD) as a Corrosion Inhibitor on Mild Steel in 1 M HCl

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