N-heterocycles as corrosion inhibitors for mild steel in acid medium

Jagadeesan, Saranya; Sowmiya, M.; Palanisamy, Subramanian; Parameswari, K.; Chitra, S.; Senthilkumar, K.

doi:10.1016/j.molliq.2015.12.096

Cited by 102 publications

(33 citation statements)

References 45 publications

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“…Table 5 shows the electrochemical parameters corresponding to polarization results at various temperatures in 0.1 M HCl solution. These results clearly show that inhibitive effect for all conditions decreases with increasing the solution temperature, which can be attributed to the quick desorption of adsorbed inhibitor molecules from the surface in addition to the decomposition of these molecules at elevated temperatures [37,40,42]. Nonetheless the corrosion rate of inhibited solution is always lower than the blank one.…”

Section: Effect Of Temperaturementioning

confidence: 75%

“…Though the Tafel slopes do not follow a definite trend, the variation of b c and b a with alteration of inhibitor concentration and surface microstructure reveals the effect of these variables on the kinetics of anodic and cathodic reactions. Electrochemical impedance spectroscopy (EIS) is a powerful technique that has been used in understanding the mechanisms of corrosion, passivation and charge transfer phenomena of metals and alloys in aggressive environments [40]. In our study, EIS was employed in order to confirm the kinetics and electrochemical characteristics of iron dissolution for Ref and WB coupons in the absence and presence of 3-AT.…”

Section: Resultsmentioning

confidence: 99%

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Improved corrosion inhibition of 3-amino-1,2,4-triazole on mild steel electrode in HCl solution using surface nanocrystallization

Pour-Ali

Rashid

Babakhani

2016

International Journal of Materials Research

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Improved corrosion inhibition of 3-amino-1,2,4triazole on mild steel electrode in HCl solution using surface nanocrystallization A nanocrystalline surface layer with average grain size of 77 nm was produced on mild steel through a wire brushing process. Its corrosion behavior was studied in the absence and presence of 3-amino-1,2,4-triazole (3-AT) as corrosion inhibitor. Although the increase in the inhibitor concentration shows a positive effect on inhibition efficiency of micro-and nano-grained surfaces, this effect is more remarkable for the sample with a nanocrystalline surface layer. In addition, in the presence of the optimum concentration of 3-AT, temperature increment has a more negative effect on the sample with a microcrystalline surface layer. The results also revealed that due to enhanced adsorption of 3-AT inhibitor and formation of a protective layer with a high polarization resistance, the inhibition effect of 3-AT increased as the grain size decreased from microcrystalline to nanocrystalline.

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Section: Effect Of Temperaturementioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Improved corrosion inhibition of 3-amino-1,2,4-triazole on mild steel electrode in HCl solution using surface nanocrystallization

Pour-Ali

Rashid

Babakhani

2016

International Journal of Materials Research

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“…Numerous studies have been conducted to fit the experimental data to different isotherms with the general mathematical form [36]:…”

Section: Adsorption Isotherm and Thermodynamic Parametersmentioning

confidence: 99%

“…Although PILs have the same characteristics of ILs monomer, they can be adapted to provide specific properties as they can be tailored for a specific application by carefully selecting the cations, anions, functional groups, polymer backbone, and chain length [35]. Nowadays, these substances attract much attention in corrosion engineering because of their excellent wetting properties in addition to their effective adsorption over several substrates of metals in which the π-electrons in conjugation with active polar heteroatoms constitute as chelating centres [36,37].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and application of acrylate-based poly ionic liquid for corrosion protection of C1020 steel In hydrochloric acid solution

Gobara

Saleh²,

Naeem

2019

Mater. Res. Express

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Poly ionic liquids (PIL) are eco-friendly in addition to being sustainable compounds that can be easily prepared and tailored according to the application. In this study, a novel PIL polymer based on acrylate was chemically synthesised via free radical polymerization method controlled by quenching the reversible reaction. The prepared 1-Butyl-3 Methylimidazolium Acrylate polymer (PAL) was characterised using FTIR as well as NMR to confirm the chemical structure. GPC was employed to determine the average molecular weight of the new polymer. PAL was applied as an effective corrosion inhibitor for C1020 steel in 1M HCl aqueous solution. Weight loss and electrochemical techniques, PDP and EIS, were applied to evaluate the corrosion inhibition performance. The electrochemical results showed that PAL acts as a mixed-type inhibitor reaches 91.8% at room temperature. The thermodynamic calculations showed that the adsorption process is exothermic. Furthermore, PAL molecules were adsorbed on the metal surface by both chemisorption and physisorption processes. SEM analysis was carried out to confirm the corrosion evaluation results. Also, quantum chemical calculations, at the B3LYP/DND level of theory, were carried out to correlate the electronic structure parameters of PAL inhibitor to its adsorption behaviour which in turn is relevant to the inhibition efficiency. Additionally, Monte Carlo simulation (MC) was conducted to investigate the adsorption modes and the interaction energies of the inhibitor on iron surface.

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“…[9][10][11][12] Free electron pairs on heteroatoms or p electrons and polar groups containing nitrogen, oxygen, phosphorus and/or sulphur in the molecular structure are fundamental characteristics of good inhibitors. [13][14][15][16] The structure and coverage of the inhibitory molecules both determine their inhibiting ability.…”

Section: Introductionmentioning

confidence: 99%

Ionic salt (4-ethoxybenzyl)-triphenylphosphonium bromide as a green corrosion inhibitor on mild steel in acidic medium: experimental and theoretical evaluation

et al. 2017

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A new phosphonium salt (4-ethoxybenzyl)-triphenylphosphonium bromide (EBTPPB), having different substituents attached to phosphorous and having different anions, is investigated as an inhibitor for mild steel (MS) corrosion in 0.5 M H 2 SO 4 solutions via electrochemical polarization and electrochemical impedance (EI) spectroscopy. Electrochemical results show that EBTPPB compound has practically good inhibiting features for MS corrosion in the corrosive medium with efficiencies of approximately 98% at an optimum 10 À2 M concentration. The inhibition is of a mixed cathodic-anodic type. Passive potential (E pp ) of the modified steel specimen is in the inactive region and thus inhibits the corrosion process.Langmuir Adsorption (LA) isotherm was performed to provide precise information on the adsorption behavior of the ionic salt. It exhibits both physisorption and predominantly chemisorption mechanism on MS surface. Scanning Electron Microscopy (SEM) associated with Energy Dispersion X-ray (EDX) and Atomic Force Microscopy (AFM) assessment of the electrode surface is consistent with the existence of adsorbing screen of EBTPPB molecules. An apparent connection was ascertained between the experimental corrosion inhibition efficiency (IE%) and the theoretical parameters using quantum chemical calculations.

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N-heterocycles as corrosion inhibitors for mild steel in acid medium

Cited by 102 publications

References 45 publications

Improved corrosion inhibition of 3-amino-1,2,4-triazole on mild steel electrode in HCl solution using surface nanocrystallization

Improved corrosion inhibition of 3-amino-1,2,4-triazole on mild steel electrode in HCl solution using surface nanocrystallization

Synthesis, characterization and application of acrylate-based poly ionic liquid for corrosion protection of C1020 steel In hydrochloric acid solution

Ionic salt (4-ethoxybenzyl)-triphenylphosphonium bromide as a green corrosion inhibitor on mild steel in acidic medium: experimental and theoretical evaluation

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