Hyperbranched poly(cyanurateamine): A new corrosion inhibitor for mild steel in hydrochloric acid medium

Thirumoolan, D.; Katkar, Vikas A.; Gunasekaran, G.; Kanai, Tapan; Basha, K. Anver

doi:10.1016/j.porgcoat.2014.03.018

Cited by 44 publications

(22 citation statements)

References 70 publications

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“…The trend of increasing Ea values as with inhibitor concentrations has been reported by other researchers on studies on various plant extract such as jujube leaves (Sivakumar and Mohana, 2012), black pepper (Quraishi et al, 2009), sunflower leaves (Cang et al, 2012), and piper nigrum extract (Norzila and Anis, 2015). It has been reported that lower Ea value in the presence of inhibitors in comparison to the blank is attributed to chemical adsorption (Solomon et al, 2010;Thirumoolan et al, 2014;Mouheddin et al, 2018). Since, the Ea increased in the presence of inhibitor compared to the blank, the mechanism of corrosion can be ascribed to physical adsorption (physisorption) mechanism.…”

Section: Effect Of Temperature On Corrosionmentioning

confidence: 99%

Kinetics and thermodynamic study of corrosion inhibition of mild steel in 1.5m HCl medium using cocoa leaf extract as inhibitor

Okewale¹,

Adesina²

2020

Journal of Applied Sciences and Environmental Management

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This study examined the corrosion inhibition of mild steel in 1.5M HCl solution using cocoa leaf extract as an inhibitor. The effect of inhibitor concentrations, kinetics, and time of immersion were undertaken at 30 o C while the thermodynamic parameters were determined with temperature range of 35 o C-55 o C. FTIR result indicated that the actual adsorption of the inhibitor is as a result of donation of single pair of electrons on oxygen to the vacant d-orbitals of the metal (mild steel) that leads to the formation of complexes on the mild steel surface. The corrosion rate decreased from 1.64 g/cm 2 hr to 0.09gm/cm 2 hr in the presence of inhibitor used. However, increased in temperature showed a decreased in inhibition efficiency this resulted to an increase in rate of corrosion. Half-life of the corrosion kinetics ranges from 49.71-53. 15hr which is directly proportional to the inhibitor concentrations. Activation energy Ea, enthalpy (∆H o), and entropy (∆S o) calculated showed good interactions. The enthalpy of activation ranges from 63.28kJ/mol to 97.55kJ/mol. Rise in activation energy with inhibitor concentration confirmed the physical (physisorption) adsorption mechanism for the corrosion of mild steel surface. Endothermic nature of the corrosion process is ascertained with the positive value of ∆H o obtained.

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Section: Effect Of Temperature On Corrosionmentioning

confidence: 99%

Kinetics and thermodynamic study of corrosion inhibition of mild steel in 1.5m HCl medium using cocoa leaf extract as inhibitor

Okewale¹,

Adesina²

2020

Journal of Applied Sciences and Environmental Management

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“…Furthermore, the symmetry of the energy barrier in the anodic and cathodic directions can be expressed by evaluating the cathodic and anodic Tafel slopes, βc and βa. In this context, the shift in E corr for the entire range of concentrations is less than ±85 mV; this value is considered to be the benchmark for classification of this type of inhibitor [29]. The electrochemical corrosion parameter was evaluated using the Tafel slope analysis method, and the results are listed in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Comparative Evaluation of Anticorrosive Properties of Mahaleb Seed Extract on Carbon Steel in Two Acidic Solutions

Ganash

2019

Materials

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Aqueous extract solution of Mahaleb seed (ASMS) was prepared using a simple and safe method. ASMS was tested to examine its potential to act as a green corrosion inhibitor for preventing the dissolution of Carbon steel in highly concentrated corrosive 2 M H2SO4 and 2 M H3PO4 using an electrochemical polarization Tafel plot and electrochemical impedance spectroscopy. ASMS provided a slight increase in the inhibition efficiency of H3PO4 (89%) compared with H2SO4 (86%). Fourier transform infrared spectroscopy (FTIR) and electronic scanning microscopy (SEM) were used to prove that adsorption of ASMS occurred on the metal surface. The thermodynamic adsorption and thermodynamic activation parameters were calculated at a range of concentrations and temperatures. The physisorption of ASMS followed the Langmuir adsorption isotherm (R2 = 0.98). Finally, the role of ASMS as a protection mechanism was discussed.

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“…From the table, it is clear that E a values of the inhibited solutions are higher than that of uninhibited solution indicating that more energy barrier will be attained for the corrosion reactions of Al in 0.5 M H 2 SO 4 solution containing PMAA and PMAA + KI respectively. Also, the E a value is found to vary as the concentration of the additives; an indication of physical adsorption mechanism [47].…”

Section: Thermodynamic Considerationmentioning

confidence: 94%

Electrochemical and gravimetric measurements of inhibition of aluminum corrosion by poly (methacrylic acid) in H2SO4 solution and synergistic effect of iodide ions

Solomon

Umoren

2015

Measurement

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Hyperbranched poly(cyanurateamine): A new corrosion inhibitor for mild steel in hydrochloric acid medium

Cited by 44 publications

References 70 publications

Kinetics and thermodynamic study of corrosion inhibition of mild steel in 1.5m HCl medium using cocoa leaf extract as inhibitor

Kinetics and thermodynamic study of corrosion inhibition of mild steel in 1.5m HCl medium using cocoa leaf extract as inhibitor

Comparative Evaluation of Anticorrosive Properties of Mahaleb Seed Extract on Carbon Steel in Two Acidic Solutions

Electrochemical and gravimetric measurements of inhibition of aluminum corrosion by poly (methacrylic acid) in H2SO4 solution and synergistic effect of iodide ions

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