Elucidating the Effects of Oxide Film on Cathodic Limiting Current Density of Aluminum Alloys with Applications to Atmospheric Localized Corrosion
Abstract
Aluminum alloys have highly heterogeneous microstructures that include constituent particles and secondary phase precipitates.1,2 Some of these particles and precipitates are anodic to the Al-matrix, which can lead to localized corrosion in the presence of a conductive solution. In atmospheric environments where a thin layer electrolyte or droplet exists on the alloy surface, localized corrosion can develop and propagate only as long as its anodic current can be met by the the cathodic current outside the corrosion site3. In other words, for susceptible materials the degree of localized corrosion can be controlled by the amount of cathodic current available. There is only a limited amount of literature focused on the cathodic kinetics of aluminum alloys under atmospheric environments.4,5 The current study aims to fill this gap by exploring the key factors that control the cathodic kinetics of aluminum alloys in a simulated atmospheric environment.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 01, 2017
- Source ID
- 10.1149/ma2017-02/10/710
Entities
People
- Ali Alshanoon
- Chao Liu
- Jayendran Srinivasan
- Mary Parker
- Robert G. Kelly
- Russell Repasky