Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Khadom, Anees A.

doi:10.4067/s0717-97072014000300004

Cited by 19 publications

(7 citation statements)

References 27 publications

(30 reference statements)

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“…Corrosion rates were also severely impacted by rising temperatures in the tests with and without the SBs. For the blank sample, enhanced corrosion can be related to the decrease of hydrogen evolution overpotential 31,32 . In contrast, for samples in contact with corrosion inhibitors, increased corrosion rates can be related to desorption, decomposition, and rearrangement of inhibitory molecules, exposing the metallic surface and reducing the inhibition efficiency 33,34 .…”

Section: Weight Loss Measurementsmentioning

confidence: 99%

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

et al. 2023

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Strong acids used in industrial applications as cleaning, descaling, among others, can severely damage metallic structures, requiring corrosion inhibitors to diminish or avoid these issues. Since many conventional compounds used for this purpose may result in environmental and human health issues, eco-friendly compounds such as Schiff bases have been recently investigated. The synthesis of three novel Schiff bases (SBs) was confirmed by infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance ( 1 H-NMR). Weight loss measurements were carried out in 1 M HCl over 303K-333K. Furthermore, the combination of these compounds with a surfactant improved the efficiencies, reaching an efficiency of 93%. Optical and scanning electron microscopies confirmed the reduced roughness and pit depths of carbon steel samples. Density-functional theory calculations for neutral forms of SBs revealed that the geometrical and the energetical parameters are similar for the three studied SBs. The geometrical results exhibited more planar structures of protonated species, improving the chemical and physical interactions between aromatic rings and metallic atoms.

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Section: Weight Loss Measurementsmentioning

confidence: 99%

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

et al. 2023

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“…These values can be attributed to the kinetic energy reduction for the corrosive molecules, whether without or with inhibitor [37][38]. In this study, to better understand C1010 corrosion reaction behavior, without and with inhibitor, kinetic parameters were calculated according to Arrhenius equation [39]:…”

Section: The Effect Of Temperature On the Corrosion Reactionmentioning

confidence: 99%

Ziziphus Spina Christi Leaves Methanol Extract Evaluation as Antifungal, Antibacterial, Antioxidant and Green Inhibitor for Carbon Steel Alloy Corrosion in Hydrochloric Acid

Al-Ashoor¹,

Ali²,

Al-Sawaad³

2023

Port. Electrochim. Acta

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In this study, Zs-c leaves were extracted by a 70% CH3OH solvent. The extract was investigated as green corrosion inhibitor for CS C1010 alloy in 0.1 M HCl. The study was done with different inhibitor concentrations (1, 2, 8 and 9 ppm). The extract showed the highest IE of 96.06%, at 9 ppm. The inhibitor adsorption on the CS alloy surface was found to obey the Langmuir's adsorption isotherm model. Kads, ΔHads, ΔSads and ΔGads were also calculated. The temperature effect on Zs-c leaves extract IE%, with the optimal concentration of 9 ppm, was studied at 35,45 and 55 ºC. The results showed that IE% decreased with raising solution temperatures. In addition, 𝐸 * , ΔH, ΔS and ΔG kinetic parameters were calculated. On the other hand, phytochemical tests and quantitative analysis, such as TPC and TFC, were also carried out. In addition, the anti-bacterial activity or growth inhibition of bacterial strains, such as Ec and Sa, were studied. Antifungal activity or growth inhibition studies of Ca and An species were also carried out, at a 100 mg/mL concentration. Anti-oxidant activity was also investigated by DPPH, at concentrations of 100, 250, 500, 750 and 1000 µg/mL, and good results were obtained.

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“…under an active state which is a consequence of the decrease in the diffusion layer and increased transport of oxygen [22,23]. An increase in mechanical degradation leads to the availability of larger surface areas for attack by the corrosive media [24]. These processes occur simultaneously, significantly enhancing the corrosion and erosion rate, in case when corrosion product/inhibitor film does not adsorb to the surface [25].…”

Section: Effect Of Inhibitor Concentrationmentioning

confidence: 99%

An insight into inhibitory performance of Commiphora Mukul on corrosion of aluminum alloy under tribological conditions

2021

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An eco-friendly green corrosion inhibitor Commiphora Mukul was tested for its efficacy to control material loss in 6061 aluminum alloy under collective influence of mechanical erosion and electrochemical corrosion in a submerged jet impingement rig. Electrochemical techniques were utilized in the current investigation which consisted of potentiodynamic polarization and electrochemical impedance spectroscopy. The effect of temperature and flowrate of artificial seawater slurry on the inhibitory effect of Commiphora Mukul is investigated. Under the experimental conditions of 303 K temperature and 4 L min−1 flowrate, the inhibitor showed an efficiency of 54% as determined by the potentiodynamic polarization studies. With the increase in temperature and flowrate of artificial seawater slurry, the protection efficiency of the inhibitor decreased. Protection efficiency of 35% was observed. Possible reasons for this phenomenon were discussed. Electrochemical impedance studies reported that the process is both charge transfer and diffusion controlled. At 323 K, the diffusion component was prominent for all the studied flowrates of 4 L min−1, 8 L min−1, and 12 L min−1. It seems that the moving medium makes it challenging for the inhibitor molecules to adsorb on the metal surface in the presence of abrasive particles.

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Effect of Temperature on Corrosion Inhibition of Copper - Nickel Alloy by Tetraethylenepentamine Under Flow Conditions

Cited by 19 publications

References 27 publications

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

Ziziphus Spina Christi Leaves Methanol Extract Evaluation as Antifungal, Antibacterial, Antioxidant and Green Inhibitor for Carbon Steel Alloy Corrosion in Hydrochloric Acid

An insight into inhibitory performance of Commiphora Mukul on corrosion of aluminum alloy under tribological conditions

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