Corrosion inhibition of aluminum 6063 using some pharmaceutical compounds

Fouda, A. S.; Al-Sarawy, A. A.; Ahmed, F. Sh.; El-Abbasy, H. M.

doi:10.1134/s2070205109050244

Cited by 31 publications

(22 citation statements)

References 9 publications

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“…Here, is the frequency factor, ̸ = app is the apparent activation energy, is the gas constant, and is the absolute temperature. Equation (11) predicts that plotting of ln versus 1/ should be linear as was experimentally observed. The slope of the line gives − ̸ = app / , whereas the intercept of the lines extrapolated to (−1/ = 0) gives ln .…”

Section: Corrosion Activation Parametersmentioning

confidence: 66%

“…The remarkable potential applications of aluminum in industrial technology particularly in aluminum-air industry encouraged many investigators to study the influence of various inhibitors on Al dissolution in both acidic [1][2][3][4][5][6][7][8][9][10][11][12][13][14] and alkaline [15][16][17][18][19][20] media since the kinetics of dissolution is reduced by the presence of a thick oxide-hydroxide film at the anode surface. Most of workers have directed their research towards concentrated alkaline media, which permit optimum performance of the air cathode and a low level of aluminum polarization during normal operation [20].…”

Section: Introductionmentioning

confidence: 99%

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A Revisit to the Corrosion Inhibition of Aluminum in Aqueous Alkaline Solutions by Water-Soluble Alginates and Pectates as Anionic Polyelectrolyte Inhibitors

Hassan

Zaafarany

Gobouri

et al. 2013

International Journal of Corrosion

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The corrosion behavior of aluminum (Al) in alkaline media in presence of some natural polymer inhibitors has been reinvestigated. The inhibition action of the tested inhibitors was found to obey both Langmuir and Freundlich isotherms models. The inhibition efficiency was found to increase with increasing the inhibitors concentration and decrease with increasing the temperature, suggesting physical adsorption mechanism. Factors such as the concentration and geometrical structure of the inhibitor, concentration of the corrosive medium, and temperature affecting the corrosion rates were examined. The kinetic parameters were evaluated, and a suitable corrosion mechanism consistent with the kinetic results obtained is suggested and discussed.

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Section: Corrosion Activation Parametersmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

A Revisit to the Corrosion Inhibition of Aluminum in Aqueous Alkaline Solutions by Water-Soluble Alginates and Pectates as Anionic Polyelectrolyte Inhibitors

Hassan

Zaafarany

Gobouri

et al. 2013

International Journal of Corrosion

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“…increased ,the enthalpy of the reaction( ∆H * )decreases which synchronizing with VAC inhibitor that raised from lower to higher concentrations and that was explained according to the thermodynamic 45 relation ∆H * = Ea * -RT. The entropy of reaction (∆S * ) possess a negative charge values indicating that, activated complex in the rate determining step represents association process rather than dissociation ones 46 , Moreover , (∆S * ) has large values with increasing VAC concentrations from blank which demonstrates that, the system becomes ordered as VAC inhibitor was introduced with higher concentrations confirmed more orderliness as cleared in the higher inhibition efficiency compared to the lower concentrations 45 . Data from (Table 4) showed that the cathodic Tafel slope (βc) was shifted with a range of ± 4 mV from blank value where, for the anodic Tafel ones (βa) was shifted with a range of 19± 7 mV from blank value which confirmed the view that, the VAC extract under investigation was capable of suppressing both the cathodic hydrogen evolution and the anodic CS dissolution by making a protective layer on the CS surface.…”

Section: 46991]mentioning

confidence: 95%

Vitex agnus castus plant extract as Safe corrosion inhibitor for carbon steel 1018 in 1M hydrochloric acid

2018

jcbsc

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The corrosion inhibition effectiveness of "Vitex agnus castus"(VAC) as corrosion inhibitor for carbon steel (CS) 1018 in 1.0 M HCl was confirmed using chemical and electrochemical methods. The data resulted from the measurements indicated that the inhibition efficiency (%IE) is dependent on both temperature and concentration of the extract. Tafel polarization (TP) data indicated that the extract behaves as mixed kind inhibitor. Langmuir's adsorption isotherm was found to be the best fit. Morphology of the surface was examined using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and atomic force microscopy (AFM) which confirmed the existence of a protective film of extract molecules on CS 1018 surface.

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“…Various organic compounds have been reported as aluminum corrosion inhibitors . The inhibitory efficiency of these compounds depends mainly on the structure and nature of the adsorbed layer on the metal surface . Sulfur‐containing compounds like thiourea and its derivatives have been considered by many researchers .…”

Section: Introductionmentioning

confidence: 99%

Computational study of inhibitory effect of urea, n‐allylthiourea, thiosemicarbazide, and phenylhydrazine on the aluminum surfaces

Zeidabadinejad

Hosseini

2019

Materials & Corrosion

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The interactions between urea, n‐allylthiourea, thiosemicarbazide, and phenylhydrazine on the aluminum surface have been analyzed employing B3LYP/6‐31g(d,p) level of theory in liquid water and gas phase. The interaction energies for two orientations of urea, n‐allylthiourea, thiosemicarbazide, and phenylhydrazine were considered. The calculations revealed that in all cases the urea, n‐allylthiourea, thiosemicarbazide, and phenylhydrazine are located parallel to the Al surface. The preferred complex orientation is that one, in which the maximum number of donor atoms of inhibitors have interacted with the Al surface. The thermodynamic descriptor such as the Gibbs free energy of the complexes of inhibitors with the Al surface has been evaluated. The natural bond orbital analysis of inhibitors complexes with the Al surface was done to find out how to transfer the charge and compare the stability of the interactions. The localized orbital locator, electron location function and analysis and quantum theory of atoms in the molecule have been used to investigate the nature of the various possible interactions between inhibitors with Al surface in terms of bond critical points.

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Corrosion inhibition of aluminum 6063 using some pharmaceutical compounds

Cited by 31 publications

References 9 publications

A Revisit to the Corrosion Inhibition of Aluminum in Aqueous Alkaline Solutions by Water-Soluble Alginates and Pectates as Anionic Polyelectrolyte Inhibitors

A Revisit to the Corrosion Inhibition of Aluminum in Aqueous Alkaline Solutions by Water-Soluble Alginates and Pectates as Anionic Polyelectrolyte Inhibitors

Vitex agnus castus plant extract as Safe corrosion inhibitor for carbon steel 1018 in 1M hydrochloric acid

Computational study of inhibitory effect of urea, n‐allylthiourea, thiosemicarbazide, and phenylhydrazine on the aluminum surfaces

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