| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functionally Graded Materials, Coatings and Claddings: Toward Microstructure and Property Control
|
| Presentation Title |
Galvanic Corrosion Behavior of Functionally Graded Carbon Steel to Stainless Steel Claddings |
| Author(s) |
Scott C. Bozeman, Julie D. Tucker, O. Burkan Isgor |
| On-Site Speaker (Planned) |
Scott C. Bozeman |
| Abstract Scope |
Stainless steel claddings are frequently used to protect the carbon steel components from corrosion in many industries and applications. However, in the case of through-cracks, galvanic corrosion occurs between the dissimilar metals because of their thermodynamic potential differences in an electrolyte, where the anodic carbon steel base metal is preferentially corroded over the cathodic stainless steel cladding. Functionally graded claddings have been proposed to lessen such galvanic corrosion concerns because of their gradual concentration change, i.e., lowered driving force in the transition between metals. In this research, we fabricate functionally graded claddings of carbon steel to 309L stainless steel using laser-directed energy deposition; gradient layers are selected using thermodynamic modeling and are achieved by varying the feed rates of 309L stainless steel wire and iron powder. We then characterize the spatially-dependent galvanic corrosion behavior with scanning-vibrating electrode technique and relate the results to differences in composition and microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Surface Modification and Coatings, Iron and Steel |