Understanding and modeling the inhibitor-based mitigation of atmospherically induced structural degradation of galvanically coupled airframe components
Abstract
Environmental degradation of 7050-T7451-series Al galvanically coupled to a CRES316 cathode will be investigated along with mitigations systems pertinent to NAVAIR. Such systems may include chromate or replacement (Mo, Ce, Mn) conversion coatings, Mg or Al-rich primers, and/or current or newly developed commercial systems. The overarching theme of this proposal is to use the systematic techniques and approaches developed during the prior program to expand to consider the effects of more relevant and different environmental factors pertinent to aircraft atmospheric corrosion such as actual wet/dry behavior, oxidizing species such as Ozone, more thoroughly evaluate the effects of inhibitors which are crucial to corrosion morphology (but may not have obvious effects), to expand the crack initiation study to include updated corrosion morphologies, specimen geometries, and aggressive loading environments. This effort may also include some initial steps in a novel study to understand the crack size dependence on growth rate behavior. These studies will focus on in electrochemical environments pertinent to a generic galvanic couple.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2017
- Source ID
- N000141712033
Entities
People
- James Burns
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia