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Corrosion and hydrogen permeation in h2S environments with o2 contamination, 1: Tests on pure iron at high h2S concentration
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB. (Institut de la Corrosion)
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB. (Institut de la Corrosion)ORCID iD: 0000-0001-5399-9274
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB. (Institut de la Corrosion)
IFP Energies Nouvelles, France.
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2018 (English)In: Corrosion, ISSN 0010-9312, E-ISSN 1938-159X, Vol. 74, no 11, p. 1192-1202Article in journal (Refereed) Published
Abstract [en]

Materials selection in the oil and gas industry relies on engineering standards, such as NACE TM0177 and NACE TM0284, which stipulate that oxygen pollution should be avoided during materials testing in H2S-containing media. In this paper, we explore the manner in which traces of oxygen can modify the test solution chemistry and the corrosion of/hydrogen permeation across iron membranes in H2S-containing solutions. Oxygen pollution is shown to strongly influence solution chemistry, through the introduction of sulfur-oxygen reaction products resulting in bulk acidification. Weight loss, electrochemical methods, and solution chemistry measurements conclude that iron corrosion rates in the presence of oxygen pollution are doubled, when compared against the control system (without oxygen pollution). Unexpectedly, despite a lower pH and higher corrosion rates in the oxygen-polluted H2S-containing solutions, the hydrogen permeation rate decreases monotonically, relative to the control. We discuss how this observation is most likely related to a disruption of sulfur adsorbates involved in hydrogen entry promotion. 

Place, publisher, year, edition, pages
National Assoc. of Corrosion Engineers International , 2018. Vol. 74, no 11, p. 1192-1202
Keywords [en]
Hydrogen permeation, Hydrogen sulfide, Hydrogen-induced cracking, Sulfide stress cracking, Corrosion rate, Gas industry, Hydrogen embrittlement, Iron, Materials testing, Oxygen, Pollution control, Pollution induced corrosion, Solution mining, Sulfur, Sulfur compounds, ELectrochemical methods, Engineering standards, Hydrogen induced cracking, Materials selection, Oil and Gas Industry, Solution chemistry, Permeation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40000DOI: 10.5006/2893Scopus ID: 2-s2.0-85056526561OAI: oai:DiVA.org:ri-40000DiVA, id: diva2:1359451
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2021-06-17Bibliographically approved

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Mendibide, Christophe

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