Synthesis, characterization and electrochemical analysis of cysteine modified polymers for corrosion inhibition of mild steel in aqueous 1 M HCl

Mazumder, Mohammad A. Jafar

doi:10.1039/c8ra09833f

Cited by 28 publications

(18 citation statements)

References 63 publications

(63 reference statements)

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“…Several research studies reported that if the variation of E corr value in the presence of corrosion inhibitor is >85 mV, then the corrosion inhibitor is considered to be a cathodic or anodic type inhibitor. On the other hand, if the variation of E corr value in the presence of corrosion inhibitor is <85 mV, then the corrosion inhibitor would be considered a mixed type inhibitor [18,40,51]. In this study, the maximum shift in E corr was found to be 36 mV towards the anodic direction, indicating that the corrosion inhibitor cannot solely be classified as anodic type inhibitor but can be recognized as a mixed type inhibitor.…”

Section: Potentiodynamic Polarization Studymentioning

confidence: 63%

“…The IR spectra of polymers 5-7 were recorded by FT-IR in the frequency range 400-4000 cm −1 (Figure 1). The FT-IR spectra of polymers 5-7 showed that there is a strong absorption peak present around 3425 cm −1 due to the hydrogen bonded N-H group [40]. The symmetric and antisymmetric absorption peaks appearing at~1455 and~1458 cm −1 , respectively, suggested COO − motifs in the polymers 5 and 7 [36].…”

Section: Polymers' Syntheses and Characterizationsmentioning

confidence: 96%

“…The signal that appeared at 712.2 eV corresponds to the ferric compounds, such as FeOOH and Fe 2 O 3 (i.e., Fe 3+ oxide), and the signal at 707.1 eV was attributed to the presence of Fe 0 (2p) (Figure 11d) [58]. It is worth mentioning that the sulfide peak usually appears at 162.3 eV [40], and the signal at 133.7 eV corresponds to the P-O group present in the inhibitor molecule [57].…”

Section: Mechanism Of Inhibitionmentioning

confidence: 97%

“…The EIS data were analyzed by an equivalent circuit, which consisted of a solution resistance (R s ), polarization resistance (R p ), and a constant phase element (CPE), which is shown in Figure 7d. The R s and R p values were determined following the procedure as described [40], and used in Equation (13) to calculate the net polarization resistance (R p ).…”

Section: Eis Studymentioning

confidence: 99%

“…Several reports have been published for which a similar kind of electrochemical circuit was used to model the iron-acid interface [39,40,53]. The impedance parameters obtained from the equivalent circuit are given in Table 6.…”

Section: Eis Studymentioning

confidence: 99%

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New, Amino Acid Based Zwitterionic Polymers as Promising Corrosion Inhibitors of Mild Steel in 1 M HCl

Mazumder

2019

Coatings

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The zwitterionic monomers, N,N'-diallylamino propanephosphonate and amino acid residual N,N'-diallyl-l-methionine hydrochloride were synthesized, with excellent yields. These monomers were utilized in the preparation of zwitterionic homo and co-cyclopolymers 5-7 in aqueous solution using 2,2 -azobis (2-methylpropionamidine) dihydrochloride as an initiator. The polymers were characterized by FT-IR, NMR, and TGA. The performance of these synthesized polymers on mild steel in acidic solution was investigated by gravimetric method, Tafel extrapolation, linear polarization resistance, and electrochemical impedance spectroscopy. At 313 K, the maximum inhibition efficiencies of corrosion inhibitors 5-7 at 4.50 × 10 −4 mol L −1 were found to be 85.2%, 83.3%, and 99.5%, respectively. The inhibition efficiencies obtained from gravimetric weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements were in good agreement. Different adsorption isotherms were also explored to find the best fit, and found to obey Langmuir adsorption isotherm. The thermodynamic parameters, such as activation energy (E a ), standard enthalpy of activation (∆H*), standard entropy of activation (∆S*), adsorption-desorption equilibrium constant (K ads ), and standard free energy of adsorption (∆G o ads ), were determined. Electrochemical data indicated that the zwitterionic copolymer 7 acts as a mixed type inhibitor under the influence of anodic control. The surface morphology of mild steel corrosion was evaluated without and with corrosion inhibitors by AFM, SEM-EDX, and XPS, which confirmed the adsorption of inhibitor molecules on the metal surface.

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Section: Potentiodynamic Polarization Studymentioning

confidence: 63%

Section: Polymers' Syntheses and Characterizationsmentioning

confidence: 96%

Section: Mechanism Of Inhibitionmentioning

confidence: 97%

Section: Eis Studymentioning

confidence: 99%

Section: Eis Studymentioning

confidence: 99%

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New, Amino Acid Based Zwitterionic Polymers as Promising Corrosion Inhibitors of Mild Steel in 1 M HCl

Mazumder

2019

Coatings

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Polymeric Corrosion Inhibitors for Acid Media

Odewunmi¹,

Mazumder²,

Ali³

2022

Polymeric Corrosion Inhibitors for Greening the Chemical and Petrochemical Industry

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Construction of eco‐friendly corrosion inhibitor lignin derivative with excellent corrosion‐resistant behavior in hydrochloric acid solution

Gao

Zhao

Liu

et al. 2020

Materials & Corrosion

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Organic corrosion inhibitors from natural plant resources have received extensive attention in recent years. Herein, an eco-friendly corrosion inhibitor lignin-(2,3-epoxypropyl)trimethyl ammonium chloride (EPTAC) was successfully prepared by grafting EPTAC to kraft lignin. The inhibiting efficiency and its inhibition mechanism were investigated using electrochemical methods, adsorption thermodynamics analysis, and molecular dynamic simulation. The results showed that the lignin-EPTAC molecules formed a protective film on iron surface, resulting in an excellent inhibition efficiency of 97.80% at 100 mg/L concentration. The average surface roughness of steel samples was reduced to 26.6 nm from the original 99.3 nm. The adsorption of lignin-EPTAC molecules on the steel surface follows Langmuir adsorption isotherm model and was a physical-chemical process as well as an exothermic process of entropy reduction. This adsorption of lignin-EPTAC was a conjugated system dominated by benzene ring of lignin-EPTAC to form a chemical bond on the steel surface by conjugation, besides a positive interaction between the metal surface and the positively charged N ions in the head group of lignin-EPTAC.

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Synthesis, characterization and electrochemical analysis of cysteine modified polymers for corrosion inhibition of mild steel in aqueous 1 M HCl

Abstract: Mild steel framework embedded in corrosion inhibiting structural motifs.

Cited by 28 publications

References 63 publications

New, Amino Acid Based Zwitterionic Polymers as Promising Corrosion Inhibitors of Mild Steel in 1 M HCl

New, Amino Acid Based Zwitterionic Polymers as Promising Corrosion Inhibitors of Mild Steel in 1 M HCl

Polymeric Corrosion Inhibitors for Acid Media

Construction of eco‐friendly corrosion inhibitor lignin derivative with excellent corrosion‐resistant behavior in hydrochloric acid solution

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