| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5439982 | Corrosion Science | 2017 | 39 Pages |
Abstract
Hot corrosion in sulfate salt at 850 °C of three metallic coatings is investigated comparatively. The NiCrAlY coating loses its protectiveness after 200 h corrosion. Its oxide scale spalls off partly and becomes porous as a consequence of basic fluxing. The nanocrystalline coating (SN) performs better than the NiCrAlY one, but its scale is porous as well. Oxidation and/or sulfidation of Ta account for the formation of pores. The yttrium modified nanocrystalline coating (SNY) provides the highest corrosion resistance. Yttrium completely inhibits oxidation and sulfidation of Ta. Its scale is intact and adherent, and exclusively composted of alumina.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jinlong Wang, Minghui Chen, Yuxian Cheng, Lanlan Yang, Zebin Bao, Li Liu, Shenglong Zhu, Fuhui Wang,