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Corrosion of AD31 (AA6063) Alloy in Chloride-Containing Solutions
Department of Chemistry, Technology of Electrochemical Production and Electronic Engineering Materials, Belarusian State Technological University, Minsk.
Surface and Corrosion Science Division, KTH Royal Institute of Technology.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Department of Chemistry, Technology of Electrochemical Production and Electronic Engineering Materials, Belarusian State Technological University, Minsk.
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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
Pleiades Publishing , 2018. Vol. 54, no 2, p. 291-300
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-68686DOI: 10.1134/S2070205118020077ISI: 000431546400014Scopus ID: 2-s2.0-85046546854OAI: oai:DiVA.org:ltu-68686DiVA, id: diva2:1205008
Note

Validerad;2018;Nivå 2;2018-05-09 (andbra)

Original Russian Text © D.S. Kharitonov, I.B. Dobryden’, B. Sefer, I.M. Zharskii, P.M. Claesson, I.I. Kurilo, 2018, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2018, Vol. 54, No. 2, pp. 183–193.

Available from: 2018-05-09 Created: 2018-05-09 Last updated: 2018-05-18Bibliographically approved

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