Corrosion of Fiber Composites with Aluminum Alloy Matrixes.

Abstract

In experimental Al-Mg composites with alumina fibers, preferential pitting at fibers and enhanced corrosion rates were observed and explanations given of their relation to segregation in the solidification structure. Some of the corrosion of an Al-Li composite with alumina fibers are reported. Studies of Al-Fe alloys with a cathodic phase showed the rate of pitting to be sensitive to microstructure and fine continuous structure to give rapidly accelerating corrosion. Equations for corrosion-time in continuous and discontinuous structures were derived in terms of quantitative metallography parameters with certain assumptions regarding pit nucleation and growth. In solutions yielding preferential dissolution of the cathodic phase, fine continuous structures are predicted to be superior. Discontinuous structures were superior from the viewpoint of corrosion in both cases. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 08, 1980
Accession Number
ADA088564

Entities

People

  • M. Metzger

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Body Weight
  • Composite Materials
  • Corrosion
  • Electron Diffraction
  • Electron Microscopy
  • Equations
  • Eutectic Composites
  • Fiber Reinforced Composites
  • Materials
  • Materials Science
  • Metal Matrix Composites
  • Microstructure
  • Military Research
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.