Surface and corrosion properties of AA6063-T5 aluminum alloy in molybdate-containing sodium chloride solutions
Year: 2020
Type: article
Abstract: 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.
Source: Corrosion Science
Institutions: Belarusian State Technological University, Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, KTH Royal Institute of Technology, Luleå University of Technology, Swerim, Gdańsk University of Technology, Lodz University of Technology, Lappeenranta-Lahti University of Technology, RISE Research Institutes of Sweden
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,450
Awards: G5370307933, G7043724227
OpenAlex ID: W3021964583