Imidazoline derivative with four imidazole reaction centers as an efficient corrosion inhibitor for anti-CO2 corrosion

Summary Corrosion inhibitors are widely used to control corrosion under the sweet and sour environments in the oil and gas industry. More effective and environmentally friendly corrosion inhibitors need to be developed. This paper studies a new gemini imidazoline (GIM) corrosion inhibitor, in which two hydrocarbon chains and two head groups are linked by a rigid spacer. The GIM was synthesized through the reaction of oleic acid with triethylene tetramine at 2:1 molar ratio. The performance of the GIM on inhibition of carbon dioxide (CO2) corrosion was evaluated by linear polarization resistance in sparged-beaker testing. Rotating-wheel testing was performed to evaluate the film persistency of the test inhibitors. The results showed that corrosion inhibition of the GIM was more effective at lower concentration than that of conventional imidazoline. The mixture of GIM and fatty acid also showed better film persistency than conventional imidazoline. The emulsion tendency of the GIM was less than that of conventional imidazoline. The mechanism of the highly effective GIM was studied. It showed that GIM has much-higher surface activity than conventional imidazoline. The critical micelle concentration (CMC) of GIM is several times lower than that of conventional imidazoline. Hence, the new GIM corrosion inhibitor and its mixture give more-effective corrosion inhibition at low concentration; there is also a lesser environmental effect.

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Electrochemical and surface analysis studies on corrosion inhibition of Q235 steel by imidazoline derivative against CO2 corrosion

Corrosion Science ◽

10.1016/j.corsci.2010.09.042 ◽

2011 ◽

Vol 53 (1) ◽

pp. 353-361 ◽

Cited By ~ 106

Author(s):

B. Wang ◽

M. Du ◽

J. Zhang ◽

C.J. Gao

Keyword(s):

Surface Analysis ◽

Corrosion Inhibition ◽

Co2 Corrosion ◽

Q235 Steel ◽

Imidazoline Derivative

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The Synthesis of Imidazoline Derivative Compounds as Corrosion Inhibitor towards Carbon Steel in 1% NaCl Solution

ITB journal of Sciences ◽

10.5614/itbj.sci.2008.40.1.4 ◽

2008 ◽

Vol 40 (1) ◽

pp. 33-48 ◽

Cited By ~ 6

Author(s):

Deana Wahyuningrum ◽

Sadijah Achmad ◽

Yana Maolana Syah ◽

Buchari ◽

Bambang Ariwahjoedi

Keyword(s):

Carbon Steel ◽

Corrosion Inhibitor ◽

Nacl Solution ◽

Imidazoline Derivative

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The Salts of Nitronic acid as CO2-Corrosion Inhibitors

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v10i8.2254 ◽

2014 ◽

Vol 10 (8) ◽

pp. 3042-3052

Author(s):

Abbasov V. M. ◽

Aliyeva L. I. ◽

Haciyeva S. J. ◽

Mursalov N. I.

Keyword(s):

Protective Effect ◽

Corrosion Inhibitor ◽

Corrosion Inhibitors ◽

Isopropyl Alcohol ◽

Protective Layer ◽

Co2 Corrosion ◽

Isomeric Structure ◽

Branched Structure ◽

Higher Olefins ◽

Nitronic Acid

The salts of nitronic acids were obtained by nitration of higher olefins, both normal and isomeric structure in the presence of aqueous alkali. The resulting salts (Na+, K+, NH4+), were tested in CO2 -media as a corrosion inhibitor. The results showed that, the protective effect of the linear nitronated olefins increases by increasing the number of carbon atoms. This is due to the fact that because of the branched structure of the compounds, it is much more difficult to form a dense protective layer on the metal surface. 20% solutions of nitronated ethanolamine in isopropyl alcohol was synthesized and tested as corrosion inhibitor in carbon dioxide environments. The results showed that diethanolamine nitron based on a mixture of normal olefins C16-C18 at a concentration of 50 ppm has a high protective effect of 99.69%.

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