About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Effects of Surface Preparation Methods on Pit Morphology in Atmospheric Corrosion |
| Author(s) |
Hailong Dai, Casey Niebuhr, Xiaolei Guo |
| On-Site Speaker (Planned) |
Hailong Dai |
| Abstract Scope |
The structural integrity of spent nuclear fuel (SNF) canisters is critical for the safe, long-term containment of radioactive waste. Localized corrosion is a major degradation mechanism, strongly influenced by surface condition. This study examines the effects of different surface preparation methods—machine milling (MM), machine grinding (MG), and hand grinding (HG)—on pit initiation and pit-to-crack transition in stainless steel 304H. MM and MG surfaces showed unique pit morphologies, including micro-fissures and cracks that may act as stress concentrators and promote cracking. These features are likely driven by surface-induced factors such as residual stress, dislocation density, phase heterogeneity, and nanocrystalline structures. Electrochemical testing and advanced characterization revealed how these factors affect corrosion behavior. The results provide insight into the mechanisms of pit evolution and crack formation, offering guidance for optimizing surface treatments to improve corrosion resistance in SNF canister applications and ensure long-term storage safety. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Surface Modification and Coatings, Iron and Steel |