• Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Al–Mg–Si alloy; corrosion behaviour; Cl$^−$; passivation film.

    • Abstract


      The corrosion behaviours of Al–Mg–Si alloys were studied in different Cl$^−$ concentrations by means of scanning electron microscopy, transmission electron microscopy and electrochemical experiments. The results show that the corrosionbehaviours of Al–Mg–Si alloys are closely related to the Cl$^−$ concentration. With an increase in Cl$^−$ concentration, the corrosion rate increases sharply by facilitating the process of chemical and electrochemical reactions. In 2.0 wt.% NaCl solution, slight pitting corrosion occurred around theMgSi phase, but corrosion trenching was not found around the Fe–Mn–Si phase. In 3.5 wt.% NaCl solution, the alloy appeared localized corrosion dominated by intergranular corrosion attack. In 5.0 wt.% NaCl solution, the alloy presented serious overall corrosion, and the passivation platform of the polarization was not obvious. Furthermore, an appropriate corrosion mechanism according to polarization and electrochemical impedance spectroscopy was proposed for the Al–Mg–Si alloy in NaCl solution. In addition, the corrosion rate influenced by differentCl$^−$ concentrations was discussed in detail.

    • Author Affiliations



      1. College of Materials Science and Engineering, Central South University, Changsha 410083, People’s Republic of China
    • Dates

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.