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Study on characters of corrosion advancing edge of typical high strength aluminum alloys

  • Li Qun Zhu*
  • , An Gu
  • , Hui Cong Liu
  • , Jian Zhong Liu
  • , Xu Bin Ye
  • , Ben Run Hu
  • *Corresponding author for this work
  • Beihang University
  • Beijing Institute of Aeronautical Materials

Research output: Contribution to journalArticlepeer-review

Abstract

The micro structure of the corrosion advancing edge of typical high strength aluminum alloys (2024 and 7B04) were investigated. The samples were exposed in 3.5% NaCl solution for several durations. It was found that the expansion speed of corrosion, the shape modes of the pits and the micro structure of the pits including the micro crack of these two aluminum alloys were different. The corrosion mechanism and the influence of the micro structure of pits to the fatigue endurance were discussed. The fractal theory was used to quantify the structure of the corrosion advancing edge by determining the fractal dimensions of the cross-section contour of the pits.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalJournal of Aeronautical Materials
Volume28
Issue number6
StatePublished - Dec 2008

Keywords

  • Advancing edge of corrosion
  • Aluminum alloy
  • Fractal
  • Microstructure

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