| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
REWAS 2025: Sustainable Practices in Strategic and Critical Raw Materials: Exploring Supply Chain Resilience and Recycling Innovations
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| Presentation Title |
Investigating Niobium Coating Removal Techniques from Tool Steel Substrates
|
| Author(s) |
Akanksha Gupta, Brajendra Mishra |
| On-Site Speaker (Planned) |
Akanksha Gupta |
| Abstract Scope |
Cold-sprayed Niobium coating removal processes are investigated in the present study using oxidation and electrochemical techniques. The removal processes are optimized and compared for efficient coating removal without damaging the tool steel surface so that the substrate can be reused for intended application, thereby increasing its service life. For circular recycling, recovery of Nb as a value-added product is also an objective of the study. Electrochemical techniques of alkaline leaching and electrolytic removal of Nb coating were tested in various alkaline mediums using potentiodynamic and open circuit measurements. These processes were hindered by inherent passivating potential of Nb metal anode and its inert properties at ambient conditions. In comparison, High temperature oxidation process was found to be more economical and environmentally viable method which yielded a Nb coating recovery rate of more than 90% as >99% pure niobium pentoxide. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Recycling and Secondary Recovery, Sustainability |