Corrosion Mechanism of Low-Carbon Steel in Industrial Water and Adsorption Thermodynamics in the Presence of Some Plant Extracts

Badiea, A. M.; Mohana, K. N.

doi:10.1007/s11665-009-9378-x

Cited by 50 publications

(24 citation statements)

References 22 publications

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“…Plant extracts have become important as an environmentally acceptable readily available and renewable source for a wide range of corrosion inhibitors 9 . Plant extracts are viewed as an incredibly rich source of naturally 12 , Hibiscus sabdariffa extract 13 , Clematis gouriana 14 , Aloe vera extract 15 , Phyllantus amarus extracts 16 , Dacroydes edulis 17 , Murraya koenigii 18 , Foeniculum vulgare 19 , Chlomolaena odorata L 20 , Radish 21 and Jasminum nudiflorum 22 have been reported as effective corrosion inhibitors for metals in acidic, alkaline and neutral solutions.…”

Section: Introductionmentioning

confidence: 99%

Inhibition Performance and Adsorption Behavior of Spinacia Oleracea Leaves Extracts on Mild Steel Corrosion in Hydrochloric Acid Medium

Shivakumar¹,

Mohana²,

Gurudatt³

2012

Chem Sci Trans

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Alcoholic extracts of Spinach (SP) leaves was studied as corrosion inhibitor for mild steel in 0.5 M HCl using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The results of the study revealed that SP extracts inhibit mild steel corrosion through adsorption process following Langmuir adsorption isotherm. The protection efficiency increased with increase in inhibitor concentration and decreased with temperature. Polarization measurements indicated that the SP behaves as mixed type of inhibitor. EIS measurements showed that the charge transfer resistance increases with increase in the concentration of SP extracts. Various thermodynamic parameters such as activation energy, activation enthalpy and activation entropy were evaluated. Adsorption thermodynamic parameters were also computed and SEM was used to analyze the surface adsorbed film.

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Section: Introductionmentioning

confidence: 99%

Inhibition Performance and Adsorption Behavior of Spinacia Oleracea Leaves Extracts on Mild Steel Corrosion in Hydrochloric Acid Medium

Shivakumar¹,

Mohana²,

Gurudatt³

2012

Chem Sci Trans

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“…Impedance spectroscopy is one of the most simple and consistent techniques and also used to study the characterization of electrode (surface) behaviour in 1 N HCl solution in the absence and presence of the plants extracts [49][50][51][52]. Fig.…”

Section: Electrochemical Impedance Studies (Eis)mentioning

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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“…The thermodynamic parameters ΔG˚a ds , ΔH˚a ds , and ΔS˚a ds & can be obtained from the dependence of the equilibrium constant (obtained from the kinetic model) on temperature by linear the following equation [36]:…”

Section: Adsorption Isotherm and Thermodynamic Considerationmentioning

confidence: 99%

“…Value of ΔH˚a ds was calculated and was equal to 110. . The ΔG˚a ds value is calculated by the use of the following expression [36]. …”

Section: Adsorption Isotherm and Thermodynamic Considerationmentioning

confidence: 99%

Investigate the Corrosion Inhibition of Mild Steel in Sulfuric Acid Solution by Thiosemicarbazide

Mahgoub¹,

Al-Rashdi²

2016

OJPC

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Corrosion inhibition of mild steel in 0.5 mol/L H2SO4 was investigated in the absence and presence of different concentrations of thiosemicarbazide. The inhibition efficiency of thiosemicarbazide was studied by electrochemical impedance methods, potentiodynamic polarization and scanning electron microscopy at different inhibitor concentrations. Inhibition efficiency, corrosion rate and surface coverage were evaluated at different concentrations of thiosemicarbazide. Electrochemical impedance plots indicated that the presence of the inhibitors increased the charge transfer resistance of the corrosion process, increasing the inhibition efficiency. Polarization curves showed that this compound acted as mixed type inhibitor. The results of the investigation showed that this compound had good inhibiting properties for mild steel corrosion in 0.5 M sulfuric acid. The adsorption isotherm studies showed that Thiosemicarbazide adsorbed chemisorbed and formed a stable surface complex on the mild steel surface. And Langmuir obeyed the adsorption isotherm. Scanning electron microscopy analysis shows that, the surface morphology of the polished mild steel in the presence of thiosemicarbazide as inhibitor is smoother surface as compared with polished mild steel specimen in the absence of inhibitor.

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Corrosion Mechanism of Low-Carbon Steel in Industrial Water and Adsorption Thermodynamics in the Presence of Some Plant Extracts

Cited by 50 publications

References 22 publications

Inhibition Performance and Adsorption Behavior of Spinacia Oleracea Leaves Extracts on Mild Steel Corrosion in Hydrochloric Acid Medium

Inhibition Performance and Adsorption Behavior of Spinacia Oleracea Leaves Extracts on Mild Steel Corrosion in Hydrochloric Acid Medium

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

Investigate the Corrosion Inhibition of Mild Steel in Sulfuric Acid Solution by Thiosemicarbazide

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