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. Subject areas 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADA162448
Entities
People
- H. W. Pickering
Organizations
- Pennsylvania State University