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Inhibition of carbon steel corrosion in phase-change-materials solution by methionine and proline
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China .
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China .
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China .
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2016 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 111, 675-689 p.Article in journal (Refereed) Published
Abstract [en]

Inhibition of the 1045 carbon steel corrosion by methionine and proline in PCMs solution have been investigated. Electrochemical measurements show that these inhibitors can protect steel against corrosion, with a maximal protection efficiency up to 95.0% by methionine/proline compound inhibitor at molar ratio equal to 5:3. All inhibitors act as anodic-type inhibitor. FESEM, EDS, XRD characterization indicates that the corrosion of steel starts from pitting corrosion of Cl− ion, and gradually evolves into a general corrosion. The NH4FePO4·nH2O, Fe2O3 are the main corrosion products. XPS study confirms that Met and Pro molecule can adsorb on steel surface and form inhibition films. The inhibition mechanism was further investigated through theoretical modeling studies.

Place, publisher, year, edition, pages
2016. Vol. 111, 675-689 p.
Keyword [en]
Carbon steel, SEM, XRD, Modeling studies, Pitting corrosion
National Category
Materials Engineering Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-28929DOI: 10.1016/j.corsci.2016.06.005ISI: 000382794000062Scopus ID: 2-s2.0-84983028375OAI: oai:DiVA.org:miun-28929DiVA: diva2:974821
Note

Funding Details: 2013GXNSFBA, Guangxi Natural Science Foundation

Available from: 2016-09-27 Created: 2016-09-27 Last updated: 2016-10-07Bibliographically approved

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CiteExportLink to record
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