On the Roles of Corrosion Products in Local Cell Processes.

Abstract

This paper reviews work performed on the roles that corrosion products play in corrosion and materials degradation processes. Topics include: (1) 'wedging action' in which the tensile stresses required for crack propagation are generated by the formation of solid corrosion products within the crack cavity; (2) gas bubble formation and coalescence that eventually fills a major volume segment of a pit, crevice or crack; (3) an experimental determination and mathematical modeling of the local electrode potential and solution composition existing within active pits and crevices; (4) an analysis that shows the existence of a limiting electrode potential, E sub LIM, in a cavity and defines its value; (5) an analysis based on the E sub LIM concept and on known trends in concentrations of ionic species that provides a means for distinguishing between stress corrosion and hydrogen cracking in noble metal alloys.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA163004

Entities

People

  • Howard W. Pickering

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemistry
  • Corrosion
  • Cracks
  • Earth Sciences
  • Electrodes
  • Engineering
  • Engineers
  • Failure Mode And Effect Analysis
  • Materials
  • Materials Science
  • Metallurgy
  • Military Research
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Tensile Stress
  • United States

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Systems Analysis and Design