| Title: |
Further investigations into alloy induced acidic fluxing |
| Authors: |
Potter, Andrew; Sumner, Joy; Simms, Nigel |
| Publisher Information: |
Taylor and Francis |
| Publication Year: |
2023 |
| Collection: |
Cranfield University: Collection of E-Research - CERES |
| Subject Terms: |
Type II hot corrosion; superalloys; alloy-induced acidic fluxing; mixed mode hot corrosion |
| Description: |
Gas turbine materials often feature precipitates containing refractory metals to enhance their mechanical strength. This can make them susceptible to alloy-induced acidic fluxing whereby refractory elements increase the acidity of salt deposits. It is not clear to what degree degradation around alloy precipitates is caused by alloy-induced hot corrosion mechanisms, or the inability to develop a protective scale where precipitates are located. The effect of alloy-induced hot corrosion was isolated from the disruption of the protective-scale formation by adding particles of molybdenum to the 80/20 (Na/K)2SO4 deposit for a ‘deposit re-coat’ style hot corrosion test. The resulting morphologies were compared to samples exposed without the addition of molybdenum. Morphology changes were investigated using scanning electron microscopy with energy-dispersive X-ray mapping. Results show a mix of sulphidation and pitting. The effects of molybdenum additions appear more severe for MarM 509 compared to PWA 1483. ; Materials at High Temperature |
| Document Type: |
article in journal/newspaper |
| File Description: |
pp. 338-347; application/pdf |
| Language: |
English |
| Relation: |
https://doi.org/10.1080/09603409.2023.2219877; https://dspace.lib.cranfield.ac.uk/handle/1826/19912; 40 |
| DOI: |
10.1080/09603409.2023.2219877 |
| Availability: |
https://doi.org/10.1080/09603409.2023.2219877; https://dspace.lib.cranfield.ac.uk/handle/1826/19912 |
| Rights: |
Attribution 4.0 International ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.4BB33AE9 |
| Database: |
BASE |