Effect of exposure time with SO2 as an impurity on the corrosion behaviour of pipeline steel in CCS transportation

Mandlenkosi G.R. Mahlobo; Kasturie Premlall; Peter A. Olubambi

doi:10.1080/1478422X.2021.1982113

Effect of exposure time with SO₂ as an impurity on the corrosion behaviour of pipeline steel in CCS transportation

Mandlenkosi G.R. Mahlobo, Kasturie Premlall, Peter A. Olubambi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This study was aimed at evaluating the effects of exposure time and SO₂ as one of the impurities on the corrosion behavior of steel pipeline transporting supercritical CO₂ during carbon capture and storage. Steel coupons were exposed to supercritical CO₂ with various concentrations of SO₂ for durations up to 1512 hours. Weight loss measurements were performed to evaluate the steel corrosion behavior. The weight loss results revealed a decrease in corrosion rate with an increase in exposure time which was mainly attributed to the gradual increase of the mineral layer on the steel surface. The increase in SO₂ concentration within supercritical CO₂ increased the corrosion rate from 0.0109 mm/yr to the highest value of 1.396 mm/yr. X-ray diffraction analysis revealed that the mineral layer formed on the steel surface under pure supercritical CO₂ mainly consisted of siderite while iron sulfite hydrate was observed under in the presence of SO₂.

Original language	English
Pages (from-to)	44-54
Number of pages	11
Journal	Corrosion Engineering Science and Technology
Volume	57
Issue number	1
DOIs	https://doi.org/10.1080/1478422X.2021.1982113
Publication status	Published - 2022
Externally published	Yes

Keywords

Carbon steel
SEM
SO
XRD
supercritical CO
weight loss method

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1080/1478422X.2021.1982113

Cite this

@article{0936e15409da4228adf4d5e8bc777e75,

title = "Effect of exposure time with SO2 as an impurity on the corrosion behaviour of pipeline steel in CCS transportation",

abstract = "This study was aimed at evaluating the effects of exposure time and SO2 as one of the impurities on the corrosion behavior of steel pipeline transporting supercritical CO2 during carbon capture and storage. Steel coupons were exposed to supercritical CO2 with various concentrations of SO2 for durations up to 1512 hours. Weight loss measurements were performed to evaluate the steel corrosion behavior. The weight loss results revealed a decrease in corrosion rate with an increase in exposure time which was mainly attributed to the gradual increase of the mineral layer on the steel surface. The increase in SO2 concentration within supercritical CO2 increased the corrosion rate from 0.0109 mm/yr to the highest value of 1.396 mm/yr. X-ray diffraction analysis revealed that the mineral layer formed on the steel surface under pure supercritical CO2 mainly consisted of siderite while iron sulfite hydrate was observed under in the presence of SO2.",

keywords = "Carbon steel, SEM, SO, XRD, supercritical CO, weight loss method",

author = "Mahlobo, {Mandlenkosi G.R.} and Kasturie Premlall and Olubambi, {Peter A.}",

note = "Publisher Copyright: {\textcopyright} 2021 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.",

year = "2022",

doi = "10.1080/1478422X.2021.1982113",

language = "English",

volume = "57",

pages = "44--54",

journal = "Corrosion Engineering Science and Technology",

issn = "1478-422X",

publisher = "SAGE Publications Inc.",

number = "1",

}

TY - JOUR

T1 - Effect of exposure time with SO2 as an impurity on the corrosion behaviour of pipeline steel in CCS transportation

AU - Mahlobo, Mandlenkosi G.R.

AU - Premlall, Kasturie

AU - Olubambi, Peter A.

PY - 2022

Y1 - 2022

N2 - This study was aimed at evaluating the effects of exposure time and SO2 as one of the impurities on the corrosion behavior of steel pipeline transporting supercritical CO2 during carbon capture and storage. Steel coupons were exposed to supercritical CO2 with various concentrations of SO2 for durations up to 1512 hours. Weight loss measurements were performed to evaluate the steel corrosion behavior. The weight loss results revealed a decrease in corrosion rate with an increase in exposure time which was mainly attributed to the gradual increase of the mineral layer on the steel surface. The increase in SO2 concentration within supercritical CO2 increased the corrosion rate from 0.0109 mm/yr to the highest value of 1.396 mm/yr. X-ray diffraction analysis revealed that the mineral layer formed on the steel surface under pure supercritical CO2 mainly consisted of siderite while iron sulfite hydrate was observed under in the presence of SO2.

AB - This study was aimed at evaluating the effects of exposure time and SO2 as one of the impurities on the corrosion behavior of steel pipeline transporting supercritical CO2 during carbon capture and storage. Steel coupons were exposed to supercritical CO2 with various concentrations of SO2 for durations up to 1512 hours. Weight loss measurements were performed to evaluate the steel corrosion behavior. The weight loss results revealed a decrease in corrosion rate with an increase in exposure time which was mainly attributed to the gradual increase of the mineral layer on the steel surface. The increase in SO2 concentration within supercritical CO2 increased the corrosion rate from 0.0109 mm/yr to the highest value of 1.396 mm/yr. X-ray diffraction analysis revealed that the mineral layer formed on the steel surface under pure supercritical CO2 mainly consisted of siderite while iron sulfite hydrate was observed under in the presence of SO2.

KW - Carbon steel

KW - SEM

KW - SO

KW - XRD

KW - supercritical CO

KW - weight loss method

UR - http://www.scopus.com/inward/record.url?scp=85115665771&partnerID=8YFLogxK

U2 - 10.1080/1478422X.2021.1982113

DO - 10.1080/1478422X.2021.1982113

M3 - Article

AN - SCOPUS:85115665771

SN - 1478-422X

VL - 57

SP - 44

EP - 54

JO - Corrosion Engineering Science and Technology

JF - Corrosion Engineering Science and Technology

IS - 1

ER -