CO2 corrosion inhibition of X-70 pipeline steel by carboxyamido imidazoline

Ortega-Sotelo, D. M.; Neri-Flores, M.A.; Casales, M.; Martínez, Lucy María Reidl; Martínez‐Villafañe, A.

doi:10.1007/s10008-010-1226-2

Cited by 32 publications

(12 citation statements)

References 24 publications

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“…According to the observed characteristics, the corrosion resistance of carbon steel decreases constantly and adsorption-diffusion processes are observed. This may be due to absorption of intermediate species (FeOH) derived from the hydrolysis of iron, or due to adsorption of the water-soluble fractions (WSF's) of the diesel [9,11,36]. Fig.…”

Section: Wherementioning

confidence: 99%

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Porcayo-Calderón

Rivera-Muñoz

Peza-Ledesma

et al. 2017

J. Electrochem. Sci. Technol

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Palm oil production is among the highest worldwide, and it has been mainly used in the food industry and other commodities. Currently, a lot of palm oil production has been destined for the synthesis of biodiesel; however, its use in applications other than the food industry has been questioned. Thereby for a sustainable development, in this paper the use of palm oil of low quality for corrosion inhibitors synthesis is proposed. The performance of the synthesized inhibitors was evaluated by using electrochemical techniques such as open circuit potential measurements, linear polarization resistance and electrochemical impedance spectroscopy. The results indicate that the fatty amides from palm oil are excellent corrosion inhibitors with protection efficiencies greater than 98%. Fatty amides molecules act as cathodic inhibitors decreasing the anodic dissolution of iron. When fatty amides are added, a rapid decrease in the corrosion rate occurs due to the rapid formation of a molecular film onto carbon steel surface. During the adsorption process of the inhibitor a self-organization of the hydrocarbon chains takes place forming a tightly packed hydrophobic film. These results demonstrate that the use of palm oil for the production of green inhibitors promises to be an excellent alternative for a sustainable use of the palm oil production.

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Section: Wherementioning

confidence: 99%

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Porcayo-Calderón

Rivera-Muñoz

Peza-Ledesma

et al. 2017

J. Electrochem. Sci. Technol

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“…However, at lower frequency values, the presence of a new capacitive-like semicircle was evident. Its lower capacitance could be attributed to adsorption phenomena of intermediate species as FeOH due to the hydrolysis of Fe during the metal dissolution process [24] or to the presence of the watersoluble fractions (WSFs) of the oil phase, which can be adsorbed on the steel surface thereby reducing the corrosion rate, besides affecting the mass transfer processes [23]. Figure 7 shows the Bode plots for carbon steel exposed in the CO 2 -saturated (3% NaCl + 10% diesel) emulsion with 25 ppm of stearic amide as inhibitor at 50 ∘ C. In the high frequency range, as time elapses, it is observed that the plateau region begins to form at higher frequencies than 10,000 Hz.…”

Section: Lpr Measurementsmentioning

confidence: 99%

Effect of the Unsaturation of the Hydrocarbon Chain of Fatty-Amides on theCO2Corrosion of Carbon Steel Using EIS and Real-Time Corrosion Measurement

Porcayo-Calderón

Regla

Vázquez‐Vélez

et al. 2015

Journal of Spectroscopy

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Fatty-amide derivatives were evaluated to study the effect of the double bonds into the hydrocarbon chain (C18) on the corrosion behavior of carbon steel. Electrochemical impedance spectroscopy (EIS) and real-time corrosion measurements were used to evaluate the inhibition mechanism of the fatty-amides on carbon steel in CO2-saturated (3% NaCl + 10% diesel) emulsion at 50°C. EIS results demonstrated that the unsaturation present into the hydrocarbon chain contributes to the efficiency of fatty-amides, because they can be adsorbed on the metal surface by a flat-adsorption process reducing the presence of active sites and blocking the corrosion process and preventing the diffusion of corrosive species, such as H2O, H+, Cl−, andHCO3-. Real-time corrosion measurements also indicated that the effectiveness of the inhibitors is dependent on the unsaturation into the hydrocarbon chain, being also a good technique to determine the stability of the adsorption process of the inhibitors.

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“…It can be seen that all the impedance spectra exhibit a single semicircle at high frequency, which can be attributed to the corrosion of X70 steel mainly controlled by charge transfer process in acid solution . The diameter of the Nyquist diagram exhibited larger and similar after the addition of the copolymer, which indicated that the dissolution of X70 metal in H 2 SO 4 shows similar mechanism in the absence and presence of the copolymer .…”

Section: Resultsmentioning

confidence: 84%

A new sight of water‐soluble polyacrylamide modified by β‐cyclodextrin as corrosion inhibitor for X70 steel

2014

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The application of water‐soluble polyacrylamide modified by β‐cyclodextrin (ACDPAM) as a corrosion inhibitor on X70 steel in 0.5 M H2SO4 solution has been evaluated using electrochemical measurements, weight loss, and scanning electron microscopy (SEM). The polarization curves results reveal that the copolymer acts as a mixed‐type inhibitor. The inhibition efficiency is found to increase by the increase in copolymer concentration and decreases by the rise in temperature, and it also exhibits effective inhibition even at a higher temperature. The adsorption of ACDPAM on X70 steel surface obeys the Langmuir adsorption isotherm and is governed by chemisorption. The SEM results demonstrate that X70 surface is protected by ACDPAM.

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CO2 corrosion inhibition of X-70 pipeline steel by carboxyamido imidazoline

Cited by 32 publications

References 24 publications

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Effect of the Unsaturation of the Hydrocarbon Chain of Fatty-Amides on theCO2Corrosion of Carbon Steel Using EIS and Real-Time Corrosion Measurement

A new sight of water‐soluble polyacrylamide modified by β‐cyclodextrin as corrosion inhibitor for X70 steel

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