AC and DC study of the temperature effect on mild steel corrosion in acid media in the presence of benzimidazole derivatives

Popova, A.; Соколова, Е. И.; Raicheva, S.N.; Christov, M.

doi:10.1016/s0010-938x(02)00072-0

Cited by 1,176 publications

(496 citation statements)

References 32 publications

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“…This means that the extract is more effective at higher temperature. According to Popova et al [41], unchanged or lowered activation energies in inhibited solutions when compared to that in its absence indicates a specific type of adsorption of the inhibitors, while Szauer and Brandt [42] associate this behavior with the chemisorptions of inhibitor to the metal surface. Taken into consideration the cited references and the E a value calculated from Arrhenius An alternative formulation of Arrhenius equation is [43,44]:…”

Section: Effect Of Temperaturementioning

confidence: 99%

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Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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Background The inhibitive effect of the aqueous extract of Rothmannia longiflora (RL) on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions was investigated by weight loss measurement as well as potentiodynamic polarization and electrochemical impedance spectroscopy measurements. Result The extract was found to efficiently inhibit the corrosion process in both environments and inhibition efficiency increased with increasing extract concentration as well as rise in temperature. Data from electrochemical measurements suggest that the extract functioned by adsorption of the organic matter on the metal/corrodent interface, inhibiting both the anodic and cathodic half reactions of the corrosion process. Conclusion The result obtained from this study clearly shows that RL functioned as a good inhibitor for the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 solutions and the inhibiting efficiency value increased with the inhibitor concentration. The adsorption of the RL on the mild steel surface in acid solution obeyed Langmuir adsorption isotherm.

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Section: Effect Of Temperaturementioning

confidence: 99%

“…The mechanism of corrosion inhibition may be explained on basis of adsorption behavior [37,41]. Basic information on the interaction between the inhibitor and the mild steel surface can be provided by the adsorption isotherm.…”

Section: Adsorption Considerationmentioning

confidence: 99%

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

et al. 2015

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“…This, in turn, leads to adsorption of cefixima and aminobenzylpenicillin inhibitor molecules on working electrode surface via the interface boundary between the metal and electrolyte and the imperceptible replacement of H 2 O molecules by cefixima and aminobenzylpenicillin molecules and reduces the extent of metal dissolution. This indicates that the surface of carbon steel is protected from attack of the acidic media and furthermore the variation of parameters which enhances the understanding of drug inhibitors and the concept of heterogeneity of the carbon steel surface electrode 48 . Consequently, the inhibition efficiency percentage is calculated according to equation 4 49 as collected in Table 2.…”

Section: ………(3)mentioning

confidence: 90%

“…by the "electrostatic interactions" between the inhibitor species and the metal surface and after that charge transfer occurs between these through the formation of a coordinate bond [74][75][76] . In particular, the accurate determination of the type of surface charge electrode is important to know which molecules adsorb first on its surface, especially when estimating the value of "Antropov's potential" 48 . However, from the OCP data and extrapolation the information for previous reports 41,[77][78][79] suggest that the electrode surface has a positive charge.…”

Section: Mechanism Of Corrosion Inhibitionmentioning

confidence: 99%

A Study into the Corrosion Inhibition of Carbon Steel in Acidic Medium Using Eco-Friendly Compounds

2017

Irq. Nat. J. Chem.

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The corrosion inhibition effects of cefixima and aminobenzylpenicillin drug inhibitors in 0.05M deaerated sulfuric acid solution for carbon steel have been studied by using electrochemical techniques and quantum chemical calculations as well as scanning electron microscope (SEM). It is observed from the experimental findings that both compounds perform as good inhibitors and behave according to mixed type inhibitor in terms of their inhibitory action. Additionally, it was found the percentage of corrosion inhibition become maximal when the concentrations of the cefixima and aminobenzylpenicillin inhibitors are increased. The influence of temperature on the corrosion of carbon steel has been investigated and the activation energy values estimated. The corrosion efficiency decreases with increasing the temperature range. The parameters of thermodynamic have been determined and indicate that the adsorption mechanism follows the Langmuir isotherm model and forms a protective layer on carbon steel surface electrode, which was characterized by scanning electron microscope measurements, to prevent a corrosion process. Quantum chemical calculations have been performed to provide evidence for corrosion inhibition according to the chemical structures of the cefixima and aminobenzylpenicillin drug inhibitors.

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“…In fact, heterocyclic compounds containing nitrogen, oxygen sulfur, and phosphorous have been extensively reported for their effectiveness in this field. 2,4,[12][13][14][15][16][17][18][19][20][21][22][23][24][25] Such important characteristic contributes to the adsorption phenomena on the metal surface 15 and organic molecules containing functional groups showed to be efficient corrosion inhibitors, such as amino group which act as inhibitor on metal surfaces. On the other hand, molecular solubility and degradation aspects also must be taken into account.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Analysis of an Oxazinoquinoxaline Derivative for Corrosion Inhibition of Aisi 1018 Steel

et al. 2017

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The inhibitory ability of an oxazinoquinoxaline derivative (OAQX) against the corrosion of AISI 1018 mild steel induced by aqueous 0.6 mol L -1 NaCl solution is herein evaluated. Linear polarization resistance studies showed the inhibitory efficiency of OAQX varying from 62.75% to 75.93% with OAQX concentration ranged from 0.259 x 10 -4 mol L -1 to 3.243 x 10 -4 mol L -1 . Aiming at to investigate the Tafel curves on the OAQX electrochemical behavior at saline (0.6 mol L -1 NaCl) aqueous media the linear Tafel segments of anodic and cathodic curves were extrapolated to the intersection point which afforded corrosion potential (E corr ) and corrosion current density (i corr ) data. By applying Tafel approach the efficiency of OAQX ranges from 55.30% to 87.60%. In both analysis Langmuir isotherm lead to optimized adsorption parameter. The adsorption mechanism of OAQX is proposed from FTIR experiments and quantum calculations. The theoretical employed method is hybrid B3LYP combined with 6-311++G(d,p). Theoretical results showed OAQX as a promising inhibitor that form a stable protective metal-ligand film on metal surfaces, and differs from several heterocyclic compounds due to its solubility in small amount of DMSO (0.627 x 10 -4 mol L -1 ) which is resistant to a saline aqueous media (0.6 mol L -1 NaCl).Keywords: oxazinoquinoxaline derivative; corrosion inhibitor; linear polarization resistance; FTIR analysis; modeling studies. INTRODUÇÃOCorrosion is one of the main problems found in several industrial processes since it leads to material failure and this damage cause several consequences, including pollution, risks of accidents and financial losses. [1][2][3][4][5] Mild steels have been extensively employed in many industrial fields due to their interesting properties, easy fabrication and low cost. 6 However, they are sensitive to corrosion phenomenon, and become an environmental problem. In this sense, it is important to focuses on the demand for fossil fuels from which a major application of mild steels arrives from their use in the petroleum industry. Since the largest oil sources are located underground in oceans and seas, corrosion of these materials by saline conditions has been attracting considerable attention. [7][8][9][10] The addition of a corrosion inhibitor in the corrosive medium is one of the most common approaches to control corrosion process. 11 In this context, since mild steels are basically composed of metallic atoms (iron, manganese, copper, among others) the choice of a corrosion inhibitor especially comes from its electron donation ability or electrostatic interaction. The chemical structure of organic compounds contain elements like oxygen, sulfur, nitrogen as well as π bonds, which shows high electron density. In fact, heterocyclic compounds containing nitrogen, oxygen sulfur, and phosphorous have been extensively reported for their effectiveness in this field. 2,4,[12][13][14][15][16][17][18][19][20][21][22][23][24][25] Such important characteristic contributes to the adsorption phenom...

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AC and DC study of the temperature effect on mild steel corrosion in acid media in the presence of benzimidazole derivatives

Cited by 1,176 publications

References 32 publications

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

Rothmannia longiflora extract as corrosion inhibitor for mild steel in acidic media

A Study into the Corrosion Inhibition of Carbon Steel in Acidic Medium Using Eco-Friendly Compounds

Experimental and Theoretical Analysis of an Oxazinoquinoxaline Derivative for Corrosion Inhibition of Aisi 1018 Steel

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