Berberine as a natural source inhibitor for mild steel in 1M H2SO4

Li, Yan; Zhao, Peng; Liang, Qiang; Hou, Baorong

doi:10.1016/j.apsusc.2005.02.094

Cited by 200 publications

(77 citation statements)

References 14 publications

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“…In this case, the negative sign of free energy of adsorption for the plant extract indicates that the adsorption of the plant extract on steel surface was a spontaneous process and the adsorption could be physisorption, where ΔG°ads is equal -10.60 kJ/mol. Studies of El-Etre [33] and Li et al [34] reported similar kind of results. .…”

Section: Kinetics and Mechanism Of Corrosion Inhibitionsupporting

confidence: 67%

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Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Al-Turkustani

2013

Eur. J. Chem.

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KEYWORDSThe corrosion inhibition characteristics of pandanus tectorius extract on corrosion of steel in 1 M H2SO4 were investigated using chemical and electrochemical measurements at various temperatures (30, 40, 50 and 60 °C). The effect of acid concentration on the corrosion rate of steel increases with acid concentration (0.25-2.00 M) showing first order corrosion reaction without changing the reaction mechanism. The results showed that when the concentration of pandanus tectorius extract increased from 5% to 15% (v:v), the rate of steel corrosion is decreased, which indicated that pandanus tectorius extract are good inhibitor for steel corrosion in 1 M H2SO4 at 30 °C and attains 88.02% at 15% (v:v) from weight loss method. Electrochemical results showed that the investigated extract was acted as mixed type inhibitor. The free energy of adsorption ΔGads for pandanus tectorius, indicates that the process was spontaneous and physically adsorbed (physisorption) onto the steel surface. Also, scanning electron microscopy (SEM) is used to support the obtained result. The trend of inhibition efficiency with temperature suggests physical adsorption of this extract on the corroding steel surface. Thermodynamic functions ∆Eapp, ∆H* and ∆S* has been calculated and are discussed.

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Section: Kinetics and Mechanism Of Corrosion Inhibitionsupporting

confidence: 67%

“…This shows a weak adsorption interaction between steel surface and the inhibitor [35,36]. The dependence of corrosion rate on the temperature can be regarded as an Arrhenius-type process, the rate of which is given by [37]:…”

Section: Effect Of Temperaturementioning

confidence: 99%

Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Al-Turkustani

2013

Eur. J. Chem.

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“…(Fig. 14) which will result in the formation of a five-membered, redox active a-iminoketo chelate ring [86,87]. The UV-visible absorption spectra (Fig.…”

Section: Mechanism Of Corrosion Inhibitionmentioning

confidence: 99%

Inhibitive properties, thermodynamic, kinetics and quantum chemical calculations of polydentate Schiff base compounds as corrosion inhibitors for iron in acidic and alkaline media

Madkour

Elroby²

2015

Int J Ind Chem

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Quantum chemical calculations based on the density functional theory (DFT) method were performed on five polydentate Schiff base compounds (PSCs), act as corrosion inhibitors for iron in aerated 2.0 M HNO 3 and 2.0 M NaOH, aiming to analyze the characteristics of the inhibitor/surface mechanism as well as to analyze the experimental data and to describe the structural nature of the inhibitor on the corrosion process. The relationship between molecular structure of PSC and their inhibition efficiencies was discussed. The inhibition effect has been investigated using weight loss, thermometric, potentiodynamic polarization measurements and quantum chemical study. Among the compounds studied, 4-(2-hydroxynaphthylideneamino) antipyrine (PSC_1) exhibited the best inhibition efficiency IE (%) 78.4 % at 10 -4 M at 303 K. The high IE of (PSCs) was attributed to the blocking of active sites by adsorption of inhibitor molecules on the iron surface. Adsorption of (PSCs) inhibitors is spontaneous, exothermic, obeyed Temkin isotherm and is regarded as physiochemical mechanism. Polarization measurements indicate that all the examined Schiff bases are of mixedtype inhibitor in HNO 3 ; causing only inhibition of the cathode process in NaOH. The results showed that the inhibition efficiency of PSCs increased with the increase in E HOMO and decrease in E LUMO -E HOMO ; and the areas containing N and O atoms are most possible sites for bonding the metal iron surface by donating electrons to the metal.

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“…Very popular and recent trend was used as green or eco-friendly inhibitor, is one of best practical method to protect/reducing corrosion attack [1][2][3][4][5]. More researchers have been reported for synthetic organics [6][7][8][9][10], polymer [11][12][13][14][15][16][17], heterocyclic compounds [18][19][20][21][22][23][24][25] plants extract [26][27][28][29][30][31][32][33][34][35] and various parts like leaf, flowers, seeds, fruits [36][37][38][39] as corrosion inhibitor for mild steel, aluminium, carbon steel, zinc, copper and alloys in various medium. The present work is designed as a contribution to the growing interest on environmentally benign corrosion inhibitory study to cheap, environmentally safe, less toxic and easily available substance and simple procedure [40][41][42][43][44][45]…”

Section: Introductionmentioning

confidence: 99%

Gloriosa superba Linn. Extract as Eco-friendly Inhibitor for Mild Steel in Acid Medium: A Comparative Study

Sivakumar¹,

Srikanth²

2018

Asian J. Chem.

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The comparative studies of various parts of the plant Gloriosa superba Linn. extract (leaves, flowers, stems, tubers) were carried out to investigate the corrosion protection efficiency on the corrosion of mild steel in 1 N HCl medium by using mass loss method, polarization measurements and electrochemical impedance spectroscopy at room temperature. Polarization measurements showed that the studied extract acts as mixed type inhibitor with significant reduction of cathodic and anodic current densities. Organic moieties present in the extract are found responsible for effective performance of inhibitor which is well supported by FTIR studies. On comparison, optimum inhibition efficiency was found in Gloriosa superba Linn. stem extracts with 99.80 % at 15 ppm concentration. The nature of protective film formed on the mild steel surface has been confirmed by SEM analysis. The surface coverage values fits well to the Temkin adsorption isotherm.

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Berberine as a natural source inhibitor for mild steel in 1M H2SO4

Cited by 200 publications

References 14 publications

Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Inhibitive properties, thermodynamic, kinetics and quantum chemical calculations of polydentate Schiff base compounds as corrosion inhibitors for iron in acidic and alkaline media

Gloriosa superba Linn. Extract as Eco-friendly Inhibitor for Mild Steel in Acid Medium: A Comparative Study

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