About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
To Galvanically Corrode or Not Galvanically Corrode |
Author(s) |
Cody Falconer, Yafei Wang, William Doniger, Matthew Weinstein, Mohamed Elbakhshwan, Kumar Sridharan, Adrien Couet |
On-Site Speaker (Planned) |
Cody Falconer |
Abstract Scope |
Molten salts continue to be a complex and corrosive medium for materials in molten salt reactor designs. Protecting materials from degradation may require multiple material flavors. Mixing materials in a corrosive environment creates an even more complex environment with multiple corrosion mechanisms involved. Two corrosion mechanisms are hypothesized to affect dissimilar materials in a salt medium: galvanic coupling and activity gradient mass transport. To understand which of these mechanisms dominates, static isothermal corrosion tests and electrochemical techniques were used to study the corrosion mechanisms of dissimilar metal couples of 316L/Ni-201 and 316L/C-110 subjected to the same salt environment. Open circuit potential measurements were performed on each couple and showed similar electric potential differences while zero resistance ammeter measurements confirmed similar galvanic currents. However, isothermal corrosion testing showed galvanic current measurements did not accurately reflect the true corrosion of each couple and activity gradient mass transport dominates the behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Other, High-Temperature Materials |