About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Understanding Corrosion-Related Cracking
|
| Presentation Title |
Pre-crack Degradation Pathways of NaCl-assisted Hot Corrosion of a 2nd Generation Ni-based Superalloy |
| Author(s) |
Preston Nguyen, Douglas Konitzer, Brian Gleeson |
| On-Site Speaker (Planned) |
Brian Gleeson |
| Abstract Scope |
Sulfate-deposit-induced hot corrosion can accelerate degradation at temperatures as low as 550°C. Na2SO4 is the prototypical deposit of interest when investigating hot corrosion at the lab scale; however, other salts, such as chlorides, are known to influence the extent of corrosion. This study examines NaCl-assisted hot corrosion of a 2nd generation Ni-based superalloy at 700 and 900°C. The results show that NaCl can play an aggressive role when added to Na2SO4, particularly in the early stages of degradation. To that extent, the mode of subsurface degradation in the alloy can be viewed in the context of crack-formation susceptibility. |