The inhibition of carbon steel corrosion in hydrochloric and sulfuric acid media using some benzimidazole derivatives

Aljourani, J.; Golozar, M.A.; Raeissi, K.

doi:10.1016/j.matchemphys.2010.01.040

Cited by 141 publications

(57 citation statements)

References 27 publications

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“…The nature of the bond between the adsorbed inhibitor molecules and the metal surface can be studied by the adsorption isotherms. Some authors have found that the adsorption of 2‐MBI molecules on steel and copper alloys obeys a Langmuir adsorption isotherm 12, 13, 16, 20. However, other bibliographic references report that this behavior has not been observed on Zn and steel surfaces 10, 15.…”

Section: Resultsmentioning

confidence: 99%

“…Equation (4) shows the relationship between the fraction of covered surface ( θ ) and the concentration of the corrosion inhibitor ( C ) for a Langmuir model 13. For this Langmuir model a linear relationship is obtained when plotting C / θ as a function of inhibitor concentration in mol L −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Organic compounds containing sulfur have been found to be good corrosion inhibitors in CO 2 ‐containing environments 9. It has been demonstrated that the heterocyclic compound, 2‐mercaptobenzimidazole (2‐MBI), is a good corrosion inhibitor for carbon steel 10–14, zinc 15, copper 16, and copper alloys 17, in acid environments (HCl, H 2 SO 4 , and H 3 PO 4 ). Figure 1 shows the chemical structure of 2‐MBI.…”

Section: Introductionmentioning

confidence: 99%

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Effects of turbulent flow on the corrosion inhibition properties of 2‐mercaptobenzimidazole

Olvera-Martínez

Mendoza-Flores

Rodríguez-Gómez

et al. 2012

Materials & Corrosion

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The electrochemical techniques, that is, polarization resistance (Rp) and potentiodynamic polarization curves, were used in order to determine the effect of turbulent flow on the corrosion inhibiting effect of 2‐mercaptobenzimidazole (2‐MBI) on API 5L X52 grade steel samples immersed in a 3% NaCl aqueous solution saturated with CO2 at 60 °C. Turbulent flow conditions were controlled using a rotating cylinder electrode (RCE). An inhibition efficiency of 98% was measured at a concentration of 10 ppm of 2‐MBI at a rotation rate of 5000 rpm. This efficiency value is similar to those efficiency values measured at 25 and 40 ppm 2‐MBI and at the same rotation rate. These observations suggest that as the turbulent flow conditions increase the corrosion inhibiting effect of 2‐MBI is enhanced. 2‐MBI follows a Langmuir adsorption isotherm. The calculated values of adsorption equilibrium constant (Kads) and adsorption free energy ($\Delta G_{{\rm ads}}^{{\rm o}} $) suggest that the adsorption process taking place is chemical. The polarization curves indicate that the 2‐MBI does not modify the electrochemical mechanism of the anodic (Fe dissolution) and cathodic (hydrogen evolution) reactions. It is suggested that 2‐MBI decreases the rate at which these reactions occur, blocking the active sites on the steel surface.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of turbulent flow on the corrosion inhibition properties of 2‐mercaptobenzimidazole

Olvera-Martínez

Mendoza-Flores

Rodríguez-Gómez

et al. 2012

Materials & Corrosion

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“…It is found that molecules containing both N and S can claim excellent inhibition compared with those containing only N or S [5,6]. bis thiadiazole derivatives [7], thiosemicarbazide derivatives [8], Benzimidazole derivatives [9], and purines [10] have been verified to be efficient inhibitors for steel.…”

Section: Introductionmentioning

confidence: 99%

Acid Corrosion Inhibition of Steel by Lamotrigine

et al. 2012

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Corrosion inhibition effect of lamotrigine on steel in 1.0 M HCl and 0.5 M H 2 SO 4 was studied by techniques like weight loss, polarisation, and electrochemical impedance spectroscopy. Results indicated that lamotrigine is more competent in HCl than in H 2 SO 4 and is justified by scanning electron micrographs. Protection efficiency increased with the concentration of inhibitor and decreased with temperature. Adsorption study revealed the comprehensive adsorption of lamotrigine molecules on steel surface.

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“…Aqueous solutions of acids, primarily sulfuric acid, are used for scouring, cleaning boilers, descaling , and acid treatment of wells [2,3]. These solutions are some of the most corrosive media.One method of protecting carbon steel from corrosion is to use organic inhibitors [4][5][6][7][8], which are heterocyclic compounds containing phosphorus, sulfur, oxygen, or nitrogen and have π bonds [9, 10]. Almost all of these compounds are unfortunately very expensive and hazardous to the environment.…”

mentioning

confidence: 99%

Rosemary oil as a corrosion inhibitor for carbon steel in 0.5 M sulfuric acid solution

Al-Nowaiser

Abdallah

El‐Mossalamy

2011

Chem Technol Fuels Oils

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The possibility of using rosemary oil as a corrosion inhibitor of carbon steel in 0.5 M sulfuric acid solution was investigated by determination of weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. It was shown that the inhibition effectiveness increases with an increase in the concentration of oil and a decrease in the temperature. The inhibiting effect of the investigated oil is due to its adsorption on the surface of the steel and complexation. Adsorption is described by a Langmuir isotherm. The effect of the temperature on the corrosion rate was studied in the presence and absence of the oil and the thermodynamic parameters of the corrosion process were calculated.Equipment made of carbon steel is widely used in the oil industry [1]. The main problem in using this steel is its low corrosion resistance in acid medium. Aqueous solutions of acids, primarily sulfuric acid, are used for scouring, cleaning boilers, descaling , and acid treatment of wells [2,3]. These solutions are some of the most corrosive media.One method of protecting carbon steel from corrosion is to use organic inhibitors [4][5][6][7][8], which are heterocyclic compounds containing phosphorus, sulfur, oxygen, or nitrogen and have π bonds [9, 10]. Almost all of these compounds are unfortunately very expensive and hazardous to the environment. For this reason, it is very important to select an inexpensive inhibitor that is safe to use. Some natural oils were previously investigated as corrosion inhibitors for metals and alloys [11][12][13][14]. We investigated the inhibition effectiveness of rosemary oil for carbon steel in 0.5 M sulfuric acid solution. Carbon steel L-52 of the following composition, wt. %, was used in the experiments: 0.26 carbon; 1.35 manganese; 1.04 phosphorus; 0.05 sulfur; 0.05 niobium; 0.02 vanadium; 0.03 titanium; remainder -iron. The weight loss of steel plates with a total surface area of 4 cm 2 was determined with the method described in [15]. The samples were immersed in 0.5 M sulfuric acid solution (50 ml) with no inhibitor and with rosemary oil in different concentrations and held for 6 h. Cylindrical electrodes surrounded by Araldite with an open surface area of 0.64 cm 2 were used for the studies by potentiodynamic polarization and electrochemical impedance spectroscopy. Before conducting the experiments, the electrodes were polished with different types of emery paper, degreased

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The inhibition of carbon steel corrosion in hydrochloric and sulfuric acid media using some benzimidazole derivatives

Cited by 141 publications

References 27 publications

Effects of turbulent flow on the corrosion inhibition properties of 2‐mercaptobenzimidazole

Effects of turbulent flow on the corrosion inhibition properties of 2‐mercaptobenzimidazole

Acid Corrosion Inhibition of Steel by Lamotrigine

Rosemary oil as a corrosion inhibitor for carbon steel in 0.5 M sulfuric acid solution

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