Minified dose of urispas drug as better corrosion constraint for soft steel in sulphuric acid solution

Saini, Nisha; Kumar, Rajeev; Lgaz, Hassane; Salghi, R.; Chung, Ill‐Min; Kumar, Sumit; Lata, Suman

doi:10.1016/j.molliq.2018.08.070

Cited by 64 publications

(12 citation statements)

References 36 publications

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“…It is clear from Table 1 that after increasing the concentration of inhibitor, the inhibition efficiency increased, while the corrosion current density decreased due to adsorption of inhibitor molecule on the metal surface. The minor shift in E corr value towards positive direction in the presence of inhibitor as compared to the E corr value in the absence of inhibitor indicates that tested inhibitor acts as mixed type inhibitor [19]. Figure 3 shows the Nyquist diagrams for mild steel in 2 M H 3 PO 4 at 298 K containing various concentrations of CBT.…”

Section: Polarization Resultsmentioning

confidence: 99%

Anticorrosive efficiency of novel 1,4-benzothiazinone derivative for mild steel in phosphoric acid solution

2019

Int. J. Corros. Scale Inhib.

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Corrosion is a big challenge and many corrosion control methods have been adopted all over the world. It can damage the materials, which are used to construct automobiles, pipeline systems, bridges and buildings, petroleum refineries, etc. Corrosion inhibitors are used as effective alternatives for the protection of metallic surfaces against corrosion. Herein, the corrosion inhibition characteristics of 2-(4-сhlorophenyl)-1,4-benzothiazin-3-one (CBT) have been studied as efficient inhibitor for corrosion control of mild steel in 2.0 M phosphoric acid solution using potentiodynamic polarization, weight loss measurements and electrochemical impedance spectroscopy (EIS) techniques. The effects of inhibitor concentration on the inhibition action were investigated. The corrosion inhibition efficiency increased with the increase of CBT concentration up to 85% obtained at 25 °C at 5 mM concentration. The adsorption of CBT on metal surface obeyed Langmuir adsorption isotherm. Adsorption isotherm study suggests that both physical and chemical adsorptions may be the type of adsorption of the inhibitor on the metal surface. Polarization measurements showed that the CBT acted as mixed inhibitor. The surface morphology of mild steel, in the absence and presence of CBT in 2.0 M phosphoric acid solution, was studied using scanning electron microscopy (SEM). The SEM analysis strongly supports the results of electrochemical measurements.

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Section: Polarization Resultsmentioning

confidence: 99%

Anticorrosive efficiency of novel 1,4-benzothiazinone derivative for mild steel in phosphoric acid solution

2019

Int. J. Corros. Scale Inhib.

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“…Langmuir adsorption isotherm was derived based on the assumption that the adsorption surface possesses sites with equivalent/similar energies of adsorption, allowing maximum/saturated adsorption of solute molecules for adsorbent monolayer coverage [33]. It implies that molecules following Langmuir adsorption mechanism should have slope value of unity as predicted by Equation (S2).…”

Section: Resultsmentioning

confidence: 99%

“…The Frumkin adsorption model is an isotherm type which explains the extent of lateral interactions among the adsorbed molecules on adsorbent surface [33], the linear form used herein (see supporting information for Equation (S6)), where C is the inhibitor concentration, θ is surface coverage, “ α ” is the Frumkin lateral interaction constant describing the interaction in adsorbed layer and K Fr is the adsorption equilibrium constant obtained from Frumkin isotherm. The values of K Fr and “ α ” were derived respectively from the intercepts and slopes of Figure 4e,f (Equation (S6)) for the studied molecules.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

et al. 2019

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This study describes the adsorption behavior of organic inhibitors at the aluminum-HCl solution interface and their corrosion inhibition performance. The organic inhibitors employed are: 4-(benzo [d]thiazol-2ylthio)phthalonitrile (BTThio) and tetrakis[(benzo[d]thiazol-2-yl-thio)phthalo- cyaninato]gallium(III) chloride (ClGaBTThioPc). The corrosion behavior of these inhibitors is investigated using electrochemical and computational techniques. Open circuit potential results reveal predominant cathodic character for the mechanism of aluminum corrosion inhibition by the inhibitors. Inhibition efficiency values from potentiodynamic polarization measurements increase from 46.9 to 70.8% for BTThio and 59.7 to 81.0% for ClGaBTThioPc within the concentration range of 2 to 10 μM. Scanning electron microscopy (SEM) measurements reveal protection of the metal surface from acid attack, in the presence of the inhibitors and energy dispersive X-ray (EDX) measurements show that the most probable way by which the inhibitors protect the metal surface would be by shielding it from the corrosion attacks of Cl− from the acid. Quantum chemical parameters corroborate well with experimental findings.

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“…Chaouiki et al [12] studied the synthetic organic compounds, i.e., 4-(isopentylamino)-3-nitrobenzonitrile and 3-amino-4-(isopentylamino)benzonitrile for corrosion inhibition of mild steel in a 1.0 M HCl solution and reported that 4-(isopentylamino)-3-nitrobenzonitrile resulted in improvements to inhibition efficiency. Other synthetic organics, such as 1-hydroxyethyl-3-methylimidazolium hexafluorophosphate and 1-hydroxyethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide [13], clopidogrel [14], p-vinyl benzene sulfonate and vinyl sulfonate-functionalized polyvinyl alcohol [15], 4-mercaptopyridine-modified sodium dodecyl sulfate [16], 1H-perimidine and 1H-perimidin-2-amine [17], tetrazole derivatives [18], 4-((2,3dichlorobenzylidene)amino)-3-methyl-1H-1,2,4-triazole-5(4H)-thione [19], 5-aminopyrazole carbonitriles [20], 2-(1-piperidyl)ethyl 3-methyl-4-oxo-2-phenylchromene-8-carboxylate [21], and 1-(2-ami-noethyl)-1-dodecyl-2-(trifluoromethyl)-4,5-dihydro-1H-imidazol-1-ium chloride [22] have been investigated as corrosion inhibitors for the protection of mild steel in HCl, H 2 SO 4 , and phosphoric acid solution at room temperature. e results confirmed that the compounds reported an inhibition efficiency in the range of 57.1-81.4% [15], 97.0-98.6% [16], 34.6-92.3% [17], 71.1-94.2% [19], 56.8-95.5% [20], 91.2-97.9% [21], and 80.6-99.2% [22].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Mechanism of Mild Steel by Amylose-Acetate/Carboxymethyl Chitosan Composites in Acidic Media

Erna

Herdini

Futra

2019

International Journal of Chemical Engineering

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This article details an investigation on the mechanism of corrosion inhibition of mild steel using amylose-acetate-blended carboxymethyl chitosan (AA-CMCh) in acidic media in the context of kinetic and thermodynamic parameters. The surface of mild steel was exposed to test solutions and evaluated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The activation energy (Ea), free energy of adsorption (ΔG), enthalpy of activation (ΔHads), and entropy of activation (ΔSads) were determined in order to elucidate the mechanism of corrosion inhibition. The results confirmed that AA could be improved using CMCh as a corrosion inhibitor. The corrosion rate decreased from 1109.00 to 229.70 mdd (79.29%), while corrosion inhibition increased from 35.13 to 89.72%. Sulfate acid (H2SO4) of 0.25 M also helped in decreasing the corrosion rate from 2664.4 to 1041.67 mdd (60.9%) while also in increasing corrosion inhibition from 56.94 to 68.31%. The calculated values for ΔG, ΔHads, and ΔSads were −33.22 kJ·mol−1, −48.56 kJ·mol−1, and 0.0495 kJ·mol−1·K−1, respectively. The mechanism of corrosion inhibition of mild steel in the acidic condition is dominated and precipitated by the formation of the Fe-chelate compound, which was confirmed by the SEM/EDS spectrum. The reactions were spontaneous, exothermic, and irregular and takes place on the surface of mild steel.

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Minified dose of urispas drug as better corrosion constraint for soft steel in sulphuric acid solution

Cited by 64 publications

References 36 publications

Anticorrosive efficiency of novel 1,4-benzothiazinone derivative for mild steel in phosphoric acid solution

Anticorrosive efficiency of novel 1,4-benzothiazinone derivative for mild steel in phosphoric acid solution

Corrosion Resistance of Aluminum against Acid Activation: Impact of Benzothiazole-Substituted Gallium Phthalocyanine

Corrosion Inhibition Mechanism of Mild Steel by Amylose-Acetate/Carboxymethyl Chitosan Composites in Acidic Media

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