| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Corrosion and Environmental Degradation: Theory and Practice
|
| Presentation Title |
Pitting Corrosion of Stainless Steel 304 in Concentrated MgCl2 Solution |
| Author(s) |
Xiaolei Guo |
| On-Site Speaker (Planned) |
Xiaolei Guo |
| Abstract Scope |
Currently, spent nuclear fuel in the US is stored on-site in welded canisters made from stainless steel (SS) 304 and will remain there after the initial design life of these canisters. It is known that the ambient air used to cool the SS canisters in many locations contains salt aerosols that can deposit on the canister wall and form an aggressive aqueous brine after deliquescence from the reaction with humidity, thereby facilitating localized corrosion. This work focuses on understanding the nucleation and propagation of pitting corrosion in a concentrated MgCl2 rich brine simulating the solution chemistry developed on the canister surface after deliquescence in a low relative humidity of 40%. A unique crosshatch pit morphology was rapidly created on the SS304 surface through electrochemical approaches. Such morphology may have direct implications on the pit-to-crack transition because of the concentrated stress near the sharp pitting corrosion features. |