Prevention of Corrosion in Structural Aluminum Alloys

Abstract

We examined the general phenomenology associated with the corrosion of Al Alloy 2024-T3. Copper redistribution is controlled by S-phase dealloying and matrix dealloying. Matrix dealloying of aluminum occurs owing to the increased pH that develops at the alloy/electrolyte interface owing to oxygen reduction. We summarize results of a detailed investigation aimed at determining the mechanism and magnitude of the oxygen diffusion limited current density during corrosion of Al Atloy 2024-T3. Our results show that oxygen reduction occurs via the standard 4-electron mechanism and that the oxygen diffusion - limited current density has a value of approx. 25 uA cm(-2).

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 2002
Accession Number
ADA408530

Entities

People

  • K. Sieradzki
  • N. Dimitrov
  • R. C. Newman
  • R. W. Carpenter
  • T. J. Leclere

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Aluminum Alloys
  • Chemical Compounds
  • Chemical Engineering
  • Chemical Kinetics
  • Chemical Synthesis
  • Chemistry
  • Corrosion
  • Crystal Structure
  • Current Density
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Seabed
  • Solid Solutions
  • Three Dimensional

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Microelectronics