Metoprolol: New and Efficient Corrosion Inhibitor for Mild Steel in Hydrochloric and Sulfuric Acid Solutions

Mohammadinejad, Fatemeh; Hosseini, S.M.A.; Shahidi, Minoo; Bahrami, M.J.; Golshani, Zahra

doi:10.17344/acsi.2019.5301

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…Also, using Equation (), entropy of adsorption

(normalΔ S_{ads}^{o})

was obtained [ 48 ] :

normalΔ G_{ads}^{o} = normalΔ H_{ads}^{o} ‐ T normalΔ S_{ads}^{o} .

…”

Section: Resultsmentioning

confidence: 99%

“…Using Equation ( 6), the calculated value of G Δ ads o is −14.58 kJ/mol, which indicates that the adsorption of compound molecules of the extract occurs by physisorption interaction, and also the negative sign of G Δ ads o indicates that the adsorption process of inhibitor molecules on the metal surface is spontaneous. [28] Also, for the corrosion of the metal in acidic media with different concentrations of extract, the enthalpy of activation ( H Δ ads o ) was calculated using Equation ( 7) [48] …”

Section: Investigation Of Thermodynamic Parametersmentioning

confidence: 99%

“…where θ, A, C, R, and T are the surface coverage, an independent constant, the concentration, the gas constant, and the absolute temperature, respectively. Figure 6, depicts the plot of Ln( ) was obtained [48] :…”

Section: Investigation Of Thermodynamic Parametersmentioning

confidence: 99%

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Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media

Golshani

Moezabad

Amiri

et al. 2021

Materials & Corrosion

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Natural extracts have been widely used to protect metal materials from corrosion. Mild steel (MS) corrosion inhibition in 0.5 M sulfuric acid was investigated in the absence and presence of Thyme leaf extracts as an economical corrosion inhibitor. The effects of various concentrations and different temperatures on inhibitor efficacy were investigated. Using electrochemical impedance spectroscopy and polarization curves, the corrosion resistance of the alloy was also estimated. The polarization technique indicated that the Thyme extract is a mixed‐type inhibitor for MS in 0.5 M H2SO4. The obtained results revealed an excellent inhibition efficiency of 98% at 200 ppm of Thyme concentration. The thermodynamic parameters calculated, the effects of temperature, and the adsorption mechanism were also investigated, that suggested formation of monolayer inhibitor molecules (i.e. the Langmuir adsorption isotherm) on the metal surface. The ∆Gadso value calculated from the Langmuir adsorption isotherm plots for inhibitor indicated that it was adsorbed on the alloy surface via a physisorption mechanism. Additional studies on plant extracts as corrosion inhibitors on metals are needed to produce solutions for industrial purposes.

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“…Also, using Equation (), entropy of adsorption

(normalΔ S_{ads}^{o})

was obtained [ 48 ] :

normalΔ G_{ads}^{o} = normalΔ H_{ads}^{o} ‐ T normalΔ S_{ads}^{o} .

…”

Section: Resultsmentioning

confidence: 99%

Section: Investigation Of Thermodynamic Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media

Golshani

Moezabad

Amiri

et al. 2021

Materials & Corrosion

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“…Data at 25 °C (published in earlier work 30 ), 50 and 75 °C were considered. The values of the activation energy were calculated using the Arrhenius equation: 43,44 (7) where A is pre-exponential factor, E a is activation energy and R is a gas constant. Activation energy values are given in Figure 11.…”

Section: Activation Energy Calculationmentioning

confidence: 99%

Impact of High Temperature and Pressure to Steel Passivation in CO2 Atmosphere

Slemnik

2021

ACSi

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The corrosion behaviour of AISI 347 in 0.1 M sulfuric acid at temperatures 50 and 75 °C and pressures up to 300 bar in a CO2 atmosphere was studied by surface analysis and electrochemical methods. Corrosion reactions in which CO2 is present accelerate the formation of a protective FeCO3 layer, but the success of such a passivation depends on the saturation concentration and the corresponding temperature. Significantly better results compared to untreated steels were obtained at lower temperatures by increasing the pressure. To explain the differences in corrosion rates between samples, the activation energy for the layer dissolution was also discussed. It can be assumed that the compressibility of the CO2 at different pressures has an influence on the formation of the protective iron carbonate layer and its properties and thus to on the corrosion behaviour.

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“…These negative effects can be minimized or eliminated using diverse techniques to protect the surface of the metal from the aggressive environments. The employment of corrosion inhibitors, to keep metals and alloys against corrosion, has been considered to be the greatest practical method [3,4]. A corrosion inhibitor is a compound, when introduced or added in a little quantity to a corrosive environment regulates the rate of metal dissolution by producing a preventive barrier film, which in turn arrests the corrosive reaction from progressing [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies of Eosin Y Dye as Corrosion Inhibitors for Carbon Steel in Perchloric Acid Solution

Attar

Benchadli

Messaoudi

et al. 2020

Bull. Chem. React. Eng. Catal.

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The adsorption behavior and the inhibition performance of Eosin Y Dye for carbon steel corrosion in 1 M perchloric acid solution have been carried using weight loss and scanning electron micrograph (SEM) techniques as well theoretical calculations based on density functional theory (DFT). The studied inhibitor concentrations were between 5´10-5 M and 5´10-3 M. Results obtained revealed that Eosin Y is an effective inhibitor and its inhibition efficiency increases with increasing concentration to attain 96.91% at 5´10-3 M at 30 °C. Thermodynamic parameters such as adsorption heat, adsorption entropy and adsorption free energy were obtained from experimental data of the temperature studies of the inhibition process at five temperatures ranging from 20 to 60 °C. It was found that the adsorption of Eosin Y could prevent steel from weight loss and the adsorption accorded with the Langmuir adsorption isotherm. The free energy of adsorption showed that the corrosion inhibition takes place by spontaneous physicochemical adsorption of inhibitor molecules on the carbon steel surface. SEM and DFT studies confirm the adsorption of Eosin Y on carbon steel surface. Copyright © 2020 BCREC Group. All rights reserved

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Metoprolol: New and Efficient Corrosion Inhibitor for Mild Steel in Hydrochloric and Sulfuric Acid Solutions

Cited by 7 publications

References 15 publications

Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media

Effect of Thyme extract as an ecofriendly inhibitor for corrosion of mild steel in acidic media

Impact of High Temperature and Pressure to Steel Passivation in CO2 Atmosphere

Experimental and Theoretical Studies of Eosin Y Dye as Corrosion Inhibitors for Carbon Steel in Perchloric Acid Solution

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