Electrochemical impedance spectroscopy analysis of corrosion product layer formation on pipeline steel
dc.contributor.author | Mishra, Pratyush | |
dc.contributor.author | Yavas, Denizhan | |
dc.contributor.author | Bastawros, Ashraf | |
dc.contributor.author | Hebert, Kurt | |
dc.contributor.department | Department of Aerospace Engineering | |
dc.contributor.department | Ames National Laboratory | |
dc.contributor.department | Mechanical Engineering | |
dc.contributor.department | Department of Materials Science and Engineering | |
dc.contributor.department | Department of Chemical and Biological Engineering | |
dc.contributor.department | Ames Laboratory | |
dc.date | 2020-04-21T17:39:51.000 | |
dc.date.accessioned | 2020-06-29T22:45:44Z | |
dc.date.available | 2020-06-29T22:45:44Z | |
dc.date.copyright | Wed Jan 01 00:00:00 UTC 2020 | |
dc.date.embargo | 2022-04-17 | |
dc.date.issued | 2020-04-17 | |
dc.description.abstract | <p>Pipeline steels exhibit intergranular corrosion (IGC) and stress corrosion cracking at active dissolution potentials in carbonate-bicarbonate solutions. The evolution of electrochemical behavior of API X70 pipeline steel during active dissolution in 1 M NaHCO3 was investigated by electrochemical impedance spectroscopy (EIS). Electrochemical modeling of EIS revealed that the metal rate is limited by slow diffusion of CO3−2 ions through a porous precipitated corrosion product layer to the steel surface. Further, the porosity of the carbonate layer decreases over time as its thickness increases, both factors contributing to a strongly suppressed corrosion rate due to impeded CO3−2 diffusion. Decreasing steel corrosion rates with time in carbonate-bicarbonate solutions can be understood on this basis. Growth of the carbonate layer at the steel-carbonate interface intensifies tensile wedging stress in corroded grain boundaries, thereby facilitating intergranular crack initiation.</p> | |
dc.description.comments | <p>This is a manuscript of an article published as Mishra, Pratyush, Denizhan Yavas, Ashraf F. Bastawros, and Kurt R. Hebert. "Electrochemical impedance spectroscopy analysis of corrosion product layer formation on pipeline steel." <em>Electrochimica Acta</em> (2020): 136232. DOI: <a href="https://doi.org/10.1016/j.electacta.2020.136232" target="_blank">10.1016/j.electacta.2020.136232</a>. Posted with permission.</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/aere_pubs/164/ | |
dc.identifier.articleid | 1165 | |
dc.identifier.contextkey | 17477005 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | aere_pubs/164 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/2011 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/aere_pubs/164/2020_BastarwosAshraf_ElectrochemicalImpedance.pdf|||Fri Jan 14 20:59:49 UTC 2022 | |
dc.source.uri | 10.1016/j.electacta.2020.136232 | |
dc.subject.disciplines | Chemical Engineering | |
dc.subject.disciplines | Mechanics of Materials | |
dc.subject.disciplines | Metallurgy | |
dc.subject.keywords | Pipeline steel | |
dc.subject.keywords | Intergranular corrosion | |
dc.subject.keywords | Stress corrosion cracking | |
dc.subject.keywords | Electrochemical impedance spectroscopy | |
dc.subject.keywords | Mathematical model | |
dc.title | Electrochemical impedance spectroscopy analysis of corrosion product layer formation on pipeline steel | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
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