Morphological Evidence for a Pitting Mechanism in Dilute Aluminum Alloys.

Abstract

In the course of an investigation of the seawater corrosion behavior of several dilute aluminum alloys, direct microscopic evidence of pitting phenomena was obtained. Observations, obtained by scanning electron microscopy after galvanic corrosion exposures, illustrate a pitting mechanism involving the extrusion of columns of corrosion product from pits by the action of hydrogen gas generated inside the pits. The macroscopic dissolution patterns of the various alloys and their respective microscopi dissolution morphologies are also described. The observations support the classical model for pitting of aluminum originally presented by Edeleanu and Evans. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1978
Accession Number
ADA056297

Entities

People

  • J. R. Cummings
  • Justin Perkins
  • K. J. Graham

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Aluminum Oxides
  • Chemical Compounds
  • Chemistry
  • Contracts
  • Electron Microscopes
  • Electron Microscopy
  • Electrons
  • Engineering
  • Galvanic Corrosion
  • Materials
  • Materials Science
  • Metals
  • Microscopy
  • Military Research
  • Oxide Films
  • Scanning Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.
  • Theoretical Analysis.

Technology Areas

  • Microelectronics