Electrochemical and molecular modelling studies of CO2 corrosion inhibition characteristics of alkanolamine molecules for the protection of 1Cr steel

Shivangi Gupta; Kapil Kumar Gupta; Martin Andersson; Rouhollah Yazdi; Rajan Ambat

doi:10.1016/j.corsci.2021.109999

Electrochemical and molecular modelling studies of CO₂ corrosion inhibition characteristics of alkanolamine molecules for the protection of 1Cr steel

Shivangi Gupta^*, Kapil Kumar Gupta, Martin Andersson, Rouhollah Yazdi, Rajan Ambat

^*Corresponding author for this work

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Abstract

Effects of alkanolamine molecules on the corrosion inhibition of L80-1Cr steel were studied in a CO₂-saturated 1 wt% NaCl solution at well downhole temperatures of 20 and 80°C. The electrochemical results showed lower corrosion rates at 20°C, for which corrosion rates were more influenced by the alkanolamine injection. The experimental results and molecular modelling calculations using DFT revealed that alkanolamine adsorption/desorption played a determining role in the kinetics and characteristics of FeCO₃ formation. Additionally, the dependency of inhibitor efficiency on both chemical structures and adsorption energy on Fe(110), FeCO₃(104) and Fe₃C(001) was demonstrated, resulting in the highest efficiency provided by ethanolamine.

Original language	English
Article number	109999
Journal	Corrosion Science
Volume	195
Number of pages	15
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2021.109999
Publication status	Published - 2022

Keywords

A. Steel
B. Polarization
B. EIS
B. XPS
B. modelling studies

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title = "Electrochemical and molecular modelling studies of CO2 corrosion inhibition characteristics of alkanolamine molecules for the protection of 1Cr steel",

abstract = "Effects of alkanolamine molecules on the corrosion inhibition of L80-1Cr steel were studied in a CO2-saturated 1 wt% NaCl solution at well downhole temperatures of 20 and 80°C. The electrochemical results showed lower corrosion rates at 20°C, for which corrosion rates were more influenced by the alkanolamine injection. The experimental results and molecular modelling calculations using DFT revealed that alkanolamine adsorption/desorption played a determining role in the kinetics and characteristics of FeCO3 formation. Additionally, the dependency of inhibitor efficiency on both chemical structures and adsorption energy on Fe(110), FeCO3(104) and Fe3C(001) was demonstrated, resulting in the highest efficiency provided by ethanolamine.",

keywords = "A. Steel, B. Polarization, B. EIS, B. XPS, B. modelling studies",

author = "Shivangi Gupta and Gupta, {Kapil Kumar} and Martin Andersson and Rouhollah Yazdi and Rajan Ambat",

year = "2022",

doi = "10.1016/j.corsci.2021.109999",

language = "English",

volume = "195",

journal = "Corrosion Science",

issn = "0010-938X",

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T1 - Electrochemical and molecular modelling studies of CO2 corrosion inhibition characteristics of alkanolamine molecules for the protection of 1Cr steel

AU - Gupta, Shivangi

AU - Gupta, Kapil Kumar

AU - Andersson, Martin

AU - Yazdi, Rouhollah

AU - Ambat, Rajan

PY - 2022

Y1 - 2022

N2 - Effects of alkanolamine molecules on the corrosion inhibition of L80-1Cr steel were studied in a CO2-saturated 1 wt% NaCl solution at well downhole temperatures of 20 and 80°C. The electrochemical results showed lower corrosion rates at 20°C, for which corrosion rates were more influenced by the alkanolamine injection. The experimental results and molecular modelling calculations using DFT revealed that alkanolamine adsorption/desorption played a determining role in the kinetics and characteristics of FeCO3 formation. Additionally, the dependency of inhibitor efficiency on both chemical structures and adsorption energy on Fe(110), FeCO3(104) and Fe3C(001) was demonstrated, resulting in the highest efficiency provided by ethanolamine.

AB - Effects of alkanolamine molecules on the corrosion inhibition of L80-1Cr steel were studied in a CO2-saturated 1 wt% NaCl solution at well downhole temperatures of 20 and 80°C. The electrochemical results showed lower corrosion rates at 20°C, for which corrosion rates were more influenced by the alkanolamine injection. The experimental results and molecular modelling calculations using DFT revealed that alkanolamine adsorption/desorption played a determining role in the kinetics and characteristics of FeCO3 formation. Additionally, the dependency of inhibitor efficiency on both chemical structures and adsorption energy on Fe(110), FeCO3(104) and Fe3C(001) was demonstrated, resulting in the highest efficiency provided by ethanolamine.

KW - A. Steel

KW - B. Polarization

KW - B. EIS

KW - B. XPS

KW - B. modelling studies

U2 - 10.1016/j.corsci.2021.109999

DO - 10.1016/j.corsci.2021.109999

M3 - Journal article

SN - 0010-938X

VL - 195

JO - Corrosion Science

JF - Corrosion Science

M1 - 109999

ER -