Surface and corrosion properties of AA6063-T5 aluminum alloy in molybdate-containing sodium chloride solutions

Kharitonov, Dmitry; Dobryden, Illia; Sefer, Birhan; Ryl, Jacek; Wrzesińska, Angelika; Makarova, Irina; Bobowska, Izabela; Kurilo, Irina; Claesson, Per M. (2020-05-11)
Katso/Avaa
Lataukset: 


Post-print / Final draft

Kharitonov, Dmitry
Dobryden, Illia
Sefer, Birhan
Ryl, Jacek
Wrzesińska, Angelika
Makarova, Irina
Bobowska, Izabela
Kurilo, Irina
Claesson, Per M.
11.05.2020

Corrosion Science

171

Elsevier

School of Engineering Science

https://doi.org/10.1016/j.corsci.2020.108658
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2020120299025

Tiivistelmä

Corrosion properties of aluminum alloy AA6063-T5 were investigated in molybdate-containing NaCl solutions. Electrochemical, microscopic, and spectroscopic experiments were utilized to examine the mechanism of corrosion inhibition by molybdates. SEM-EDX, magnetic force, and intermodulation electrostatic force microscopy data suggested that the inhibition initiation preferentially occurred over Fe-rich cathodic IMPs. Spectroscopic measurements demonstrated that the formed surface layer consists of mixed Mo(VI, V, IV) species. This layer provided inhibition with an efficiency of ∼90% after 4 h of exposure. High efficacy of ∼70% was achieved even after one week of exposure. A two-step oxidation-reduction mechanism of corrosion inhibition by aqueous molybdates was proposed.

Lähdeviite

Kharitonov, D., Dobryden, I., Sefer, B., Ryl, J., Wrzesińska, A., Makarova, I., Bobowska, I., Kurilo, I., Claesson, P. M. (2020). Surface and corrosion properties of AA6063-T5 aluminum alloy in molybdate-containing sodium chloride solutions. Corrosion Science, vol. 171. DOI: 10.1016/j.corsci.2020.108658

Kokoelmat