Measurement of localized corrosion rates at inclusion particles in AA7075 by in situ three dimensional (3D) X-ray synchrotron tomography

Sudhanshu S. Singh, Jason J. Williams, Tyler J. Stannard, Xianghui Xiao, Francesco De Carlo, Nikhilesh Chawla

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

In situ X-ray synchrotron tomography was used to measure the localized corrosion rate of Mg2Si particles present in 7075 aluminum alloys in deionized ultra-filtered (DIUF) water. The evolution of hydrogen bubbles was captured as a function of time and the measured volume was used to calculate the local corrosion rate of Mg2Si particles. It was shown that in the absence of chloride ions, stress was needed to create fresh particle surfaces, either by fracture or debonding, to initiate corrosion at the particles.

Original languageEnglish (US)
Pages (from-to)330-335
Number of pages6
JournalCorrosion Science
Volume104
DOIs
StatePublished - Mar 1 2016

Keywords

  • A. Aluminum alloys
  • A. Intermetallic
  • B. X-ray tomography
  • C. Pitting corrosion

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemical Engineering(all)
  • Chemistry(all)

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