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

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.
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Category

Academic article

Language

English

Author(s)

  • Emad H. Bartawi
  • Calin Daniel Marioara
  • Ghada Shaban
  • Ehsan Rahimi
  • Oleg V. Mishin
  • Jonas Kristoffer Sunde
  • Yaiza Gonzales-Garcia
  • Randi Holmestad
  • Rajan Ambat

Affiliation

  • SINTEF Industry / Materials and Nanotechnology
  • Technical University of Denmark
  • Delft University of Technology
  • Norwegian University of Science and Technology
  • Diverse norske bedrifter og organisasjoner

Year

2024

Published in

Corrosion Science

ISSN

0010-938X

Volume

236

View this publication at Norwegian Research Information Repository