|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||3D Microstructural and Electrochemical Characterization of Galvanic Corrosion in Al7075-T651/316 Stainless Steel Couples
||Sridhar Niverty, Jason Williams, Ilaksh Adlakha, Scott Turnage, Kiran N Solanki, Nikhilesh Chawla
|On-Site Speaker (Planned)
Dissimilar metal contact in aircraft and naval structures has proven to be a persistent problem as it facilitates galvanic corrosion. Despite decades of research in the area, a model that combines the microstructural and physical aspects to the electrochemical aspects of this complex phenomenon has yet to be developed. In this study, 3D X-ray microtomography has been employed to understand galvanic corrosion in Al7075-T651 coupled to a 316 Stainless Steel fastener in 3.5% NaCl. The effect of composition and distribution of inclusions on pitting characteristics and the evolution of corrosion damage with time will be discussed. Furthermore, the confluence of ex situ X-ray microtomography and potentiodynamic polarization methods has enabled us to comprehensively understand and predict pitting behavior in Al7075.
||Planned: Supplemental Proceedings volume