Inhibiting Corrosion Cracking: Crack Tip Chemistry and Physics.
Abstract
Aqueous metallic corrosion is a complex process involving a variety of individual steps in the overall mechanism for a given alloy. The problems of pitting corrosion, crevice corrosion, stress corrosion cracking (SCC), and corrosion fatigue (CF) are, to say the least, significantly more complex. If the discussion is extended further to include the action of substances which either accelerate or inhibit these processes, the complexity of the problems is increased further by orders of magnitude. The subject of the research program discussed in this Report is an experimental exploration of the relations between accelerant/inhibitor properties and the electrochemistry and electrokinetics of corrosion, SCC, and CF in aluminum alloys. Experimental microtechniques are used to determine physical and chemical conditions at a corrosion crack tip while the bulk exterior environment is modified by the presence of corrosion accelerants or inhibitors. The chemistry of the nitrogen-system inhibitors is being explored systematically to identify accelerant/inhibitor characteristics which are effective in determining corrosion crack growth rates, thereby leading to practical inhibitor formulations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1986
- Accession Number
- ADA166317
Entities
People
- Robert Summitt
Organizations
- Michigan State University