Acid Corrosion Inhibition of Nickel by 2-(Triphenosphoranylidene) Succinic Anhydride

Khamis, E.; Bellucci, Francesco; Latanision, R. M.; El-Ashry, E. S. H.

doi:10.5006/1.3585307

Cited by 324 publications

(112 citation statements)

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“…It has been reported that values of ðÀDG 0 ðadsÞ Þ up to À20 kJ/mol are consistent with the physisorption; those around À40 kJ/mol or higher are consistent with chemisorption [38] and [62]. The high values of ðÀDG 0 ðadsÞ Þ and relative increase with temperature in the range of 25-55°C suggest a chemisorption.…”

Section: Adsorption Isothermsupporting

confidence: 62%

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Inhibitive action of gramine towards corrosion of mild steel in deaerated 1.0M hydrochloric acid solutions

et al. 2012

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a b s t r a c tThe effect of addition of gramine on mild steel dissolution in deaerated 1.0 M hydrochloric acid was studied through potentiodynamic polarisation curves, electrochemical impedance spectroscopy and gravimetric measurements in the temperature range from 25°C to 55°C. Gramine was found to shift the corrosion potentials towards less noble values and decrease both dissolution of mild steel and hydrogen evolution reaction. Gramine did not affect the corrosion reaction mechanism (blocking effect). Results obtained from the several measurement techniques were in good agreement and revealed good inhibition efficiencies in the concentration range (0.75 mM Ä 7.5 mM) particularly at higher concentrations.

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Section: Adsorption Isothermsupporting

confidence: 62%

“…The most frequently used isotherms to describe the adsorption process are: Langmuir, Frumkin, Hill de Boer, Parsons, Temkin, Flory-Huggins, Dhar-Flory-Huggins, and Bockris-Swinkels [38].…”

Section: Introductionmentioning

confidence: 99%

Inhibitive action of gramine towards corrosion of mild steel in deaerated 1.0M hydrochloric acid solutions

et al. 2012

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“…The negative values of ∆G o ads ensure the spontaneity of the adsorption process and stability of the adsorbed layer on the electrode surface. Generally, values of ∆G o ads lower than -40 kJ mol -1 are consistent with the electrostatic interaction between the charged molecules and the charged metal (physisorption); those around -50 kJ mol -1 or higher involve charge shairing or charge transfer from organic molecules to the metal surface to form a coordinate type of bond (chemisorption) [32,34]. In the present work, the calculated values of ∆G o ads are lower than -40 kJ mol -1 , indicating, therefore, that the adsorption mechanism of SA on LCS surface in 1.0 M HCl solutions (pH 4) was typical of physisorption (see Table 3).…”

Section: Adsorption Isotherms and Thermodynamic Functions Of The Adsomentioning

confidence: 83%

Thermodynamics of Adsorption

Pashley

Karaman

2004

Applied Colloid and Surface Chemistry

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“…It seems that the thermodynamic functions of the adsorption process obtained from the two methods are parallel and in a good agreement. The calculated values of ∆G o ads are low and negative, suggesting that the nature of this inhibitor adsorption is mainly physisorption and spontaneous [22][23][24][25]. It is usually accepted that the value of ∆G o ads around -20 kJ mol -1 or lower indicates the electrostatic interaction between charged metal surface and charged organic inhibitor in the bulk of the solution [26], while those around -40 kJ mol -1 or higher involve charge sharing transfer between the metal surface and the organic inhibitor [27].…”

Section: Adsorption Isotherms and Thermodynamic Functions Of Adsorptimentioning

confidence: 99%

Poly(p-Phenylenediamine) as an Inhibitor for Mild Steel in Hydrochloric Acid Medium

Rehim¹,

Sayyahand²,

Azooz³

2012

Port. Electrochim. Acta

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The corrosion behavior of mild steel (MS) in HCl solution containing various concentrations of electropolymerized P(p-phenylenediamine), P(pPD), has been investigated using weight loss and potentiodynamic polarization techniques. The data obtained from the two techniques are comparable and showed that the presence of P(pPD) in the acid solutions suppresses the corrosion rate of MS indicating that these polymers act as corrosion inhibitors (predominantly as anodic inhibitors). The inhibition efficiency (IE%) of the polymer enhances with increasing their concentrations and decrease with an increase in temperature. The inhibition occurs through adsorption and formation of barrier film on the metal surface which separates the metal from direct contact with the corrosive medium and hence protects the metal against the corrosion. The adsorption followed the Langmuir isotherm. The thermodynamic functions of the adsorption and dissolution processes were evaluated.

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Acid Corrosion Inhibition of Nickel by 2-(Triphenosphoranylidene) Succinic Anhydride

Cited by 324 publications

References 0 publications

Inhibitive action of gramine towards corrosion of mild steel in deaerated 1.0M hydrochloric acid solutions

Inhibitive action of gramine towards corrosion of mild steel in deaerated 1.0M hydrochloric acid solutions

Thermodynamics of Adsorption

Poly(p-Phenylenediamine) as an Inhibitor for Mild Steel in Hydrochloric Acid Medium

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