open access publication

Article, 2024

Effects of grain boundary chemistry and precipitate structure on intergranular corrosion in Al-Mg-Si alloys doped with Cu and Zn

Corrosion Science, ISSN 0010-938X, 1879-0496, Volume 236, Page 112227, 10.1016/j.corsci.2024.112227

Contributors

Bartawi, Emad Hasan (Corresponding author) [1] Marioara, Calin Daniel [2] Shaban, Ghada [1] Rahimi, Ehsan 0000-0002-7128-8940 [3] Mishin, Oleg V 0000-0002-2669-3453 [1] Sunde, Jonas Kristoffer 0000-0001-8634-1727 [4] Gonzalez-Garcia, Yaiza 0000-0002-8675-9290 [3] Holmestad, Randi 0000-0002-4274-5794 [5] Ambat, Rajan A 0000-0003-3402-0141 [1]

Affiliations

  1. [1] Technical University of Denmark
    2. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  2. [2] SINTEF
    3. [NORA names: Norway; Europe, Non-EU; Nordic; OECD];
  3. [3] Delft University of Technology
    4. [NORA names: Netherlands; Europe, EU; OECD];
  4. [4] Hydro Extrusions, Innovation Technology Precision Tubing, Drammensveien 264, Oslo 0283, Norway
    5. [NORA names: Norway; Europe, Non-EU; Nordic; OECD];
  5. [5] Norwegian University of Science and Technology
    6. [NORA names: Norway; Europe, Non-EU; Nordic; OECD]

Abstract

Al-Mg-Si alloys are known as structural materials and are primary alloys in the automotive industry to achieve weight reduction. Shifting toward sustainability, lower energy consumption, and less CO2 emission necessitates recycling. However, the unavoidable accumulation of scrap-related impurities, e.g., Cu and Zn, during the recycling process can influence corrosion resistance of recycled alloys. The results show that Al-Mg-Si alloys containing 0.05 wt% Cu exhibit low intergranular corrosion resistance. The intergranular corrosion resistance of these alloys is notably improved by adding 0.06 wt% Zn. Low concentrations of Cu and Zn are found to strongly affect the crystal structure of hardening precipitates.

Keywords

Al-Mg-Si, Al-Mg-Si alloys, CO2, CO2 emissions, Cu, Zn, accumulation, alloy, automotive industry, boundary chemistry, chemistry, concentrations of Cu, consumption, corrosion, corrosion resistance, crystal, crystal structure, effect, effect of grain boundary chemistry, emission, energy consumption, grain boundary chemistry, hardening precipitates, impurities, industry, influence corrosion resistance, intergranular, intergranular corrosion, intergranular corrosion resistance, low concentrations, low concentrations of Cu, low energy consumption, materials, precipitation, precipitation structure, process, recycling, recycling process, reduction, resistance, results, structural materials, structure, sustainability, weight, weight reduction

Funders

  • Danish Agency for Science and Higher Education
  • The Research Council of Norway
  • European Commission

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