Inhibition of CO2 corrosion of N80 carbon steel by carboxylic quaternary imidazoline and halide ions additives

Okafor, Peter C.; Liu, C. B.; Liu, X.; Zheng, Yian

doi:10.1007/s10800-009-9948-5

Cited by 42 publications

(16 citation statements)

References 43 publications

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“…From Table 3, it is clearly seen that the charge transfer resistance exhibits an increasing trend with increasing AEOTR and FEOTR concentration up to 2.0 g/L within the range of concentration studied. Similar observation has been reported earlier [11][12][13][14][15] and other workers which was attributed to an increase in heterogeneity resulting from the adsorption of the inhibitors on the steel surface.…”

Section: Eis Resultssupporting

confidence: 91%

“…This result is in agreement with that of thermometric measurements. These observations are indicative of the fact that addition of AEOTR and FEOTR to 1 M HCl solution has reduced the anodic dissolution and the cathodic hydrogen evolution reaction of stainless steel in the acid medium, hence functioning as mixed type corrosion inhibitors [1,5,[14][15][16][17].…”

Section: Pdp Resultsmentioning

confidence: 99%

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Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Ugi¹,

Obeten²,

Ikeuba³

2018

JAEC

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Corrosion inhibition behavior of crude alkaloids and flavonoids extracts of Ocimum tenuiflorum roots on the corrosion of high carbon steel in hydrogen chloride acid environment was studied using thermometric, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The phytocompounds showed excellent corrosion retardation ability on the high carbon steel metal in HCl acid environment. The alkaloids demonstrated a more reliable inhibition efficacy compared to flavonoids extracts with maximum inhibition efficiency of 98.1% and 93.6% respectively at a maximum concentration of 2.0 g/L. There was a noticeable increase in inhibition mitigation potential of the inhibitors with increasing concentration of extracts. A physical adsorption mechanism was recorded by the inhibitor and the Langmuir adsorption isotherm was well obeyed with correlation coefficient (R 2) at approximately 0.999. Results of electrochemical impedance spectroscopy and potentiodynamic polarization confirmed the strong adsorption of the inhibitors on the steel surface through the values of charge transfer resistance and corrosion current densities. The inhibitors proved to be stable ones on the metal and a spontaneous reaction process was recorded from the data derived from the Gibbs free energy of adsorption.

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Section: Eis Resultssupporting

confidence: 91%

Section: Pdp Resultsmentioning

confidence: 99%

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Ugi¹,

Obeten²,

Ikeuba³

2018

JAEC

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show abstract

“…The inhibition process is attributed to the formation of adsorbed films of the inhibitors via the inhibitors polycentric adsorption sites on the metal surface which protects the metal against corrosion [19][20][21][22][23].…”

Section: Structure Elucidation and Corrosion Inhibition Behavior Of Hmentioning

confidence: 99%

The inhibition of CO2 corrosion of L360 mild steel in 3.5% NaCl solution by imidazoline derivatives

Obike¹,

Okafor²,

Uwakwe³

et al. 2018

Int. J. Corros. Scale Inhib.

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2-(2-Henicos-10-enyl-4,5-dihydro-imidazol-1-yl)-ethyl]-methylamine (HDM), 2-(2-henicos-10-enyl-4,5-dihydro-imidazol-1-yl)-ethanol (HDE) and 2-henicos-10-enyl-4,5-dihydro-1Himidazole (HDI) were synthesized using the solvent free microwave assisted organic synthesis method and characterized by FT-IR. The corrosion inhibition properties of these compounds on mild steel L360 in 3.5% NaCl solution were investigated by weight loss, potentiodynamic polarization, electrochemical impedance and scanning electron microscopic techniques. The synthesized inhibitors were tested at 60°C and 80°C with concentrations of 10, 50, 100, 200 and 300 ppm, respectively. The results from the study showed that the inhibition efficiency increased with increase in the concentration of the inhibitor to a maximum and decreased with rise in temperature. An adherent layer of inhibitor molecules on the surface is proposed to account for their inhibitive action in which the organic molecules adsorb on the active anodic and cathodic sites following Langmuir isotherm. The effectiveness of these inhibitors has been correlated to their chemical structures and were in the order of HDM > HDE > HDI. The values of activation energy, free energy of adsorption and heat of adsorption were also calculated to elaborate the mechanism of corrosion inhibition. The values obtained from the heat of adsorption (Q ads ) for the three inhibitors studied (HDM, HDE and HDI) are -58.53 kJ mol -1 , -103.27 kJ mol -1 and -133.67 kJ mol -1 , respectively. These negative values indicate that the adsorption of the inhibitors on the mild steel is exothermic signifying physical adsorption. The potentiodynamic polarization data show that the compounds studied are mixed type inhibitors. The surface characteristics of inhibited and uninhibited metal samples were investigated by scanning electron microscopy (SEM).

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“…A single, depressed, and capacitive like semicircle was observed, from high to low frequencies region in the absence of inhibitor and illustrated that the corrosion process was controlled by charge transfer resistance. The appearance of the capacitive semicircle observed in the Nyquist plots is ascribed to the double layer capacitance and the charge transfer resistance of the corrosion process at the electrode surface [32]. Introducing AMPS was observed to increase the semicircle's diameter as shown in Figure 5 indicating inhibition of the corrosion process.…”

Section: Eis Measurementsmentioning

confidence: 92%

Protection of Petroleum Pipeline Carbon Steel Alloys with New Modified Core‐Shell Magnetite Nanogel against Corrosion in Acidic Medium

El-Mahdy

Atta

Dyab

et al. 2013

Journal of Chemistry

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New method was used to prepare magnetite nanoparticle based on reduction of Fe(III) ions with potassium iodide to produce Fe3O4nanoparticle. The prepared magnetite was stabilized with cross-linked polymer based on 2-acrylamido-2-methylpropane sulfonic acid (AMPS to prepare novel core-shell nanogel. In this respect, Fe3O4/poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) magnetic nanogels with controllable particle size produced via free aqueous polymerization at 65°C have been developed for the first time. The polymer was crosslinked in the presence of N,N-methylenebisacrylamide (MBA) as a crosslinker and potassium peroxydisulfate (KPS) as redox initiator system. The structure and morphology of the magnetic nanogel were characterized by Fourier transform infrared spectroscopy (FTIR) and transmission and scanning electron microscopy (TEM and SEM). The effectiveness of the synthesized compounds as corrosion inhibitors for carbon steel in 1 M HCl was investigated by various electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed enhancement in inhibition efficiencies with increasing the inhibitor concentrations. The results showed that the nanogel particles act as mixed inhibitors. EIS data revealed thatRctincreases with increasing inhibitor concentration.

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Inhibition of CO2 corrosion of N80 carbon steel by carboxylic quaternary imidazoline and halide ions additives

Cited by 42 publications

References 43 publications

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

Inhibition Efficiency of Eco-friendly Green Inhibitors (Ocimum tenuiflorum Phytocompounds) on Corrosion of High Carbon Steel in HCl Environment using Thermometric and Electrochemical Methods

The inhibition of CO2 corrosion of L360 mild steel in 3.5% NaCl solution by imidazoline derivatives

Protection of Petroleum Pipeline Carbon Steel Alloys with New Modified Core‐Shell Magnetite Nanogel against Corrosion in Acidic Medium

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