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Title: Measurement of Localized Corrosion Rates at Inclusion Particles in AA7075 by In Situ Three Dimensional (3D) X-ray Synchrotron Tomography

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.
Authors:
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Publication Date:
OSTI Identifier:
1253018
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Corrosion Science; Journal Volume: 104
Publisher:
Elsevier
Research Org:
Argonne National Laboratory (ANL)
Sponsoring Org:
Office of Naval Research; USDOE Office of Science - Office of Basic Energy Sciences
Country of Publication:
United States
Language:
English
Subject:
A. Aluminum alloys; A. Intermetallic; B. X-ray tomography; C. Pitting corrosion