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Corrosion of AD31 (AA6063) Alloy in Chloride-Containing Solutions
Belarusian State Technol Univ, Dept Chem Technol Electrochem Prod & Elect Engn M, Minsk 220006, Byelarus.;KTH Royal Inst Technol, Surface & Corros Sci Div, Drottning Kristinas Vag 51, SE-10044 Stockholm, Sweden..
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
Lulea Univ Technol, Div Mat Sci, SE-97187 Lulea, Sweden..
Belarusian State Technol Univ, Dept Chem Technol Electrochem Prod & Elect Engn M, Minsk 220006, Byelarus..
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2018 (English)In: PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES, ISSN 2070-2051, Vol. 54, no 2, p. 291-300Article in journal (Refereed) Published
Abstract [en]

Corrosion of AD31 (AA6063) alloy in neutral 0.05 M NaCl solutions is investigated via scanningprobe microscopy, linear-sweep voltammetry, and electrochemical-impedance spectroscopy. Al-Fe-Si-Mg intermetallic particles are determined to prevail in the structure of alloy and act as local cathodes. Intermodulation electrostatic-force-microscopy imaging shows that their Volta potential differs by 570 mV from that of the host aluminum matrix, making the alloy prone to localized corrosion. We show that the corrosion of alloy in the studied electrolyte mainly develops locally and results in pitting, with charge transfer being the limiting stage of the process. A mechanism of corrosion of the AD31 (AA6063) alloy in neutral chloride-containing solutions is proposed.

Place, publisher, year, edition, pages
MAIK NAUKA/INTERPERIODICA/SPRINGER , 2018. Vol. 54, no 2, p. 291-300
National Category
Corrosion Engineering
Identifiers
URN: urn:nbn:se:kth:diva-228287DOI: 10.1134/S2070205118020077ISI: 000431546400014Scopus ID: 2-s2.0-85046546854OAI: oai:DiVA.org:kth-228287DiVA, id: diva2:1208997
Note

QC 20180521

Available from: 2018-05-21 Created: 2018-05-21 Last updated: 2018-05-21Bibliographically approved

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Dobryden, IlliaClaesson, Per M.

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