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Study of Adsorption of Corrosion Inhibitor on Carbon Steel Under Co2 Environment by Using AFM

Picture for Study of Adsorption of Corrosion Inhibitor on Carbon Steel Under Co2 Environment by Using AFM
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Adsorption/desorption process of 1-(2-aminoethyl)-2-oleyl-2-imidazolinium chloride on carbon steel. To study adsorption of imidazolinium chloride on carbon steel, in-situ atomic force microscopy measurements were performed in air, with and without imidazolinium chloride, in a 1 wt% NaCl solution purged with CO2 at pH 4.

Product Number: 51317--9290-SG
ISBN: 9290 2017 CP
Author: Zineb Belarbi
Publication Date: 2017
Industry: Science of Corrosion
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The most common corrosion inhibitors used to minimize corrosion of carbon steel in the oil and gas industry contain imidazoline molecules. However the behavior of imidazoline molecules at the interface remains poorly understood especially for the adhesive and cohesive forces of inhibitor films. The objective of this work is to understand the adsorption/desorption process of talloil diethylenetriamine imidazoline (TOFA/DETA imidazoline) on carbon steel. In order to study adsorption of TOFA/DETA imidazoline on carbon steel insitu AFM measurements were performed on mild steel in air then mild steel in deoxygenated 1 wt% NaCl solution at pH around 7 then with imidazoline in 1 wt% NaCl solution purged with CO2 at pH 4. For comparison to the aggressive CO2 environment the inhibition behavior of TOFA/DETA imidazoline was monitored in less corrosive N2-saturated solutions. In-situ AFM visualization confirmed the formation of inhibitor film on carbon steel surface immersed in CO2-saturated solution resulting in a decrease in corrosion rates as determined by electrochemical measurements. Quantitative force measurements were also performed to evaluate the mechanical and adhesion properties of inhibitor film adsorbed on carbon steel. The adsorption and subsequent formation of corrosion inhibitor film at different environmental conditions was also examined using molecular simulations.

Keywords: CO2 corrosion, imidazoline, AFM, inhibition, carbon steel, CO2 corrosion

The most common corrosion inhibitors used to minimize corrosion of carbon steel in the oil and gas industry contain imidazoline molecules. However the behavior of imidazoline molecules at the interface remains poorly understood especially for the adhesive and cohesive forces of inhibitor films. The objective of this work is to understand the adsorption/desorption process of talloil diethylenetriamine imidazoline (TOFA/DETA imidazoline) on carbon steel. In order to study adsorption of TOFA/DETA imidazoline on carbon steel insitu AFM measurements were performed on mild steel in air then mild steel in deoxygenated 1 wt% NaCl solution at pH around 7 then with imidazoline in 1 wt% NaCl solution purged with CO2 at pH 4. For comparison to the aggressive CO2 environment the inhibition behavior of TOFA/DETA imidazoline was monitored in less corrosive N2-saturated solutions. In-situ AFM visualization confirmed the formation of inhibitor film on carbon steel surface immersed in CO2-saturated solution resulting in a decrease in corrosion rates as determined by electrochemical measurements. Quantitative force measurements were also performed to evaluate the mechanical and adhesion properties of inhibitor film adsorbed on carbon steel. The adsorption and subsequent formation of corrosion inhibitor film at different environmental conditions was also examined using molecular simulations.

Keywords: CO2 corrosion, imidazoline, AFM, inhibition, carbon steel, CO2 corrosion

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Effect of Temperature on Adsorption Behavior and Corrosion Inhibition Performance of Imidazoline-Type Inhibitor

Product Number: 51317--9350-SG
ISBN: 9350 2017 CP
Author: Yuan Ding
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In the present study, the effect of temperature on the adsorption/desorption kinetics and thermodynamics of diethylenetriamine talloil fatty acid imidazoline (DETA/TOFA imidazoline) is studied on a gold coated crystal using a quartz crystal microbalance (QCM) in a CO2 saturated 1wt% NaCl aqueous solution.

 
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51318-11467-Relationship between Inhibitor Adsorption and Surfactant Properties: Part I - Methodology

Product Number: 51318-11467-SG
Author: Ashwini Chandra / William Durnie / Jose Vera / Richard Woollam
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Methodology and approach used to characterize micellization and adsorption related parameters for an individual corrosion inhibitor components; specifically, data for a homologous quaternary amine series.
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51316-7274-Inhibition Mechanisms for CO2 Corrosion Mitigation by Amines at the Top-of-the-Line

Product Number: 51316-7274-SG
ISBN: 7274 2016 CP
Author: Zineb Belarbi
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The principal objective of this work is to investigate and understand the TLC inhibition mechanism in the presence of diethylamine (DEA) and morpholine. In order to determine possible interactions between the tested amines and the steel surface, the surface charge was investigated by determining the potential of zero charge (PZC).
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