Thermodynamic, chemical and electrochemical investigations of 2-mercapto benzimidazole as corrosion inhibitor for mild steel in hydrochloric acid solutions

Benabdellah, M.; Tounsi, Abdessamad; Khaled, K.F.; Hammouti, B.

doi:10.1016/j.arabjc.2010.06.010

Cited by 88 publications

(32 citation statements)

References 45 publications

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“…Therefore, it is concluded that the adsorption of P1 and P2 is neither totally physical nor chemical but complex comprehensive kind of adsorption involving both with a slight dominance of chemisorption. Similar type of observations have been reported in the literature [40][41][42][43]. …”

Section: Adsorption Isothermsupporting

confidence: 80%

Comparative study of Levofloxacin and its amide derivative as efficient water soluble inhibitors for mild steel corrosion in hydrochloric acid solution

Chaitra

Mohana

Tandon³

2016

Int J Ind Chem

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The influence of 8-fluoro-3-methyl-9-(4-methylpiperazin-1-yl)-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid or levofloxacin (P1) and newly synthesized 8-fluoro-3-methyl-9-(4-methyl-piperazin-1-yl)-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid-(5-methyl-pyridin-2-yl)-amide (P2) on corrosion inhibition of mild steel in 0.5 M hydrochloric acid solution was studied using weight loss and electrochemical techniques. Inhibition efficiency of P1 and P2 increased with concentration and decreased with temperature in the concentration range 0.14-0.35 mM in the temperature range 303-333 K. Thermodynamic parameters for dissolution and adsorption process were studied. Increase in energy of activation after the addition of inhibitors indicated formation of barrier film which prevents charge and mass transfer. Free energy of adsorption showed that the type of adsorption was neither physical nor chemical but comprehensive. The adsorption of the P1 and P2 on the mild steel surface was found to obey the Langmuir isotherm. Impedance measurement showed that there is increase in the polarization resistance and decrease in double layer capacitance after the addition of inhibitors. From polarization study as the shift in corrosion potential is more than 85 mV, both P1 and P2 are anodic type of inhibitors. Scanning electron microscope images confirm the formation of inhibitory film on mild steel surface. Quantum chemical calculation results well correlated with experimental results. Lower values of energy gap, ionization potential and hardness, higher value of softness make P2 better inhibitor compared to P1.

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Section: Adsorption Isothermsupporting

confidence: 80%

Comparative study of Levofloxacin and its amide derivative as efficient water soluble inhibitors for mild steel corrosion in hydrochloric acid solution

Chaitra

Mohana

Tandon³

2016

Int J Ind Chem

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“…But in Fig. 12 The LUMO of a neutral and b protonated species of CC molecule Electrochemical, gravimetric and quantum chemical analysis… H 2 SO 4 medium, because of less specific adsorption of sulphate ions, the adsorption of protonated CC is not much favored and leads to lesser inhibition efficiency [8,9]. As a result, CC exhibits higher inhibition efficiency in 1 M HCl.…”

Section: Quantum Studiesmentioning

confidence: 94%

“…Most of the reported acid corrosion inhibitors are organic compounds containing heteroatoms (nitrogen, sulphur, phosphorus and/or oxygen) and aromatic rings [3]. A large number of heteroaromatic compounds have been studied as corrosion inhibitors for MS in HCl medium [4][5][6][7][8][9]. However, most of them are harmful to the environment due to their toxicity, and hence there is a great demand for better corrosion inhibitors.…”

Section: Introductionmentioning

confidence: 98%

Electrochemical, gravimetric and quantum chemical analysis of mild steel corrosion inhibition by colchicine in 1 M HCl medium

et al. 2015

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The inhibition effect of colchicine (CC) on mild steel (MS) corrosion in 1 M HCl solution has been investigated by electrochemical techniques such as electrochemical impedance spectroscopy, potentiodynamic polarization, chronoamperometry and also by the gravimetric method. Polarization studies showed that CC acts as mixed type corrosion inhibitor. The inhibitor adsorption process in the MS/ CC/HCl system was studied at different temperatures (303-333 K). The adsorption of CC on MS surface is an exothermic process and obeys the Langmuir adsorption isotherm. Based on potential of zero charge values and quantum chemical parameters, the mechanism of adsorption has been proposed.

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“…As reported in literature, several values have been determined for the value of the activation energy for the corrosion of mild steel in hydrochloric solutions. Oguzie [15] reported a value of 49.3 kJ/mol; Behpour et al [16] reported a value of 53.6 kJ/mol; Benabdellah et al [17] reported a value of 59.39 kJ/mol; Naqvi et al [18] reported a value of 36.8 kJ/mol; Abdel Hameed [19] reported a value of 40.37 kJ/mol; Singh [20] reported a value of 42 kJ/mol; while Yousefi et al [21] reported a value of 60.94 kJ/mol. These variations in the reported activation energy values could be attributed to the assumptions of zero order kinetics of the corrosion process, as well as to variations in the metallurgical properties of the used mild steel.…”

Section: Inhibition Efficiencymentioning

confidence: 99%

Modeling of Corrosion Kinetics of Mild Steel in Hydrochloric Acid in the Presence and Absence of a Drug Inhibitor

Aljbour

2016

Port. Electrochim. Acta

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Cefixime was investigated as a corrosion inhibitor for mild steel in an hydrochloric acid solution. The results revealed that the order of reaction is 0.427, with activation energy found to be 41.7 kJ/mol. Cefixime was effective in increasing the inhibition efficiency for all inhibition concentrations. The corrosion rate profile was found to be secondorder kinetics with respect to corrosion activity.Keywords: mild steel; hydrochloric acid; corrosion; cefixime; kinetics. IntroductionCorrosion of metals is a major problem for the application of metals in many services. Acid solutions and, more specifically, hydrochloric acid, are used for the removal of rust and scale in industrial processes [1]. The contact between these acid solutions and metals used in industrial processes causes metal dissolution and corrosion. Corrosion causes plant shutdowns, waste of valuable resources, loss or contamination of product, reduction in efficiency, costly maintenance and expensive overdesign [2]. Because iron and steel are the backbone of industrial constructions, many attempts have been made to find methods of reducing the corrosion and wear costs of these metals. One of the most important methods in the corrosion protection of these metals is using inhibitors. Corrosion inhibitor is a chemical substance that is effective when added to a corrosive environment in very small amounts, to decrease the corrosion rate of the exposed metallic material [3]. Heterocyclic compounds containing both nitrogen and sulfur are of particular importance, as they often provide excellent inhibition [4][5][6][7][8][9][10]. Both synthetic and naturally-occurring materials have been proposed as potential inhibitors for metal corrosion [11][12][13]. Several methods have been proposed to evaluate the inhibition efficiency. The most widely used method is based on comparing the relative rate of corrosion under inhibition with and without inhibition. The calculated rates of corrosion

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Thermodynamic, chemical and electrochemical investigations of 2-mercapto benzimidazole as corrosion inhibitor for mild steel in hydrochloric acid solutions

Cited by 88 publications

References 45 publications

Comparative study of Levofloxacin and its amide derivative as efficient water soluble inhibitors for mild steel corrosion in hydrochloric acid solution

Comparative study of Levofloxacin and its amide derivative as efficient water soluble inhibitors for mild steel corrosion in hydrochloric acid solution

Electrochemical, gravimetric and quantum chemical analysis of mild steel corrosion inhibition by colchicine in 1 M HCl medium

Modeling of Corrosion Kinetics of Mild Steel in Hydrochloric Acid in the Presence and Absence of a Drug Inhibitor

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