Corrosion-resistant aluminum matrix for graphite-aluminum composites

R. G. Wendt, W. C. Moshier, Barbara Shaw, P. Miller, D. L. Olson

Research output: Contribution to specialist publicationArticle

25 Citations (Scopus)

Abstract

Graphite-aluminum (Gr-Al) metal matrix composites (MMC) possess several attractive mechanical and thermal properties, but use of these materials has been limited, partly because they are extremely susceptible to corrosion. Corrosion-resistant Al alloys that contained nonequilibrium concentrations of molybdenum (Mo) were developed as the matrix for Gr-Al composites using co-sputter deposition. Corrosion testing included potentiodynamic polarization and galvanic coupling of as-sputtered (AS) and heat-treated (HT) alloys. Polarization behavior of the AS and HT alloys measured in sodium chloride (NaCl) solutions was improved greatly over that of pure Al and traditional Gr-Al matrix alloys such as type 6061 Al (UNS A96061). Galvanic current density values for as-deposited and HT Al-18% Mo and Al-23% Mo alloys coupled to equal areas of pitch-based graphite from Amoco P75 Gr fibers were found to be up to 3 orders of magnitude lower than for pure sputtered Al-to-Gr couples. Galvanic diagrams for the Al-Mo alloys indicated corrosion was controlled by the anodic reaction irrespective of the cathode-to-anode area ratio.

Original languageEnglish (US)
Pages819-826
Number of pages8
Volume50
No11
Specialist publicationCorrosion
DOIs
StatePublished - Jan 1 1994

Fingerprint

Aluminum graphite composites
Graphite
Aluminum
Molybdenum alloys
Molybdenum
Corrosion
Corrosion resistant alloys
Sputter deposition
Potentiodynamic polarization
Sodium chloride
Sodium Chloride
Anodes
Cathodes
Current density
Thermodynamic properties
Metals
Polarization
Mechanical properties
Fibers
Composite materials

All Science Journal Classification (ASJC) codes

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

Cite this

Wendt, R. G., Moshier, W. C., Shaw, B., Miller, P., & Olson, D. L. (1994). Corrosion-resistant aluminum matrix for graphite-aluminum composites. Corrosion, 50(11), 819-826. https://doi.org/10.5006/1.3293472
Wendt, R. G. ; Moshier, W. C. ; Shaw, Barbara ; Miller, P. ; Olson, D. L. / Corrosion-resistant aluminum matrix for graphite-aluminum composites. In: Corrosion. 1994 ; Vol. 50, No. 11. pp. 819-826.
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Wendt, RG, Moshier, WC, Shaw, B, Miller, P & Olson, DL 1994, 'Corrosion-resistant aluminum matrix for graphite-aluminum composites' Corrosion, vol. 50, no. 11, pp. 819-826. https://doi.org/10.5006/1.3293472

Corrosion-resistant aluminum matrix for graphite-aluminum composites. / Wendt, R. G.; Moshier, W. C.; Shaw, Barbara; Miller, P.; Olson, D. L.

In: Corrosion, Vol. 50, No. 11, 01.01.1994, p. 819-826.

Research output: Contribution to specialist publicationArticle

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