Journal
OXIDATION OF METALS
Volume 95, Issue 1-2, Pages 23-43Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11085-020-10010-x
Keywords
Alloy; High-temperature corrosion; Oxidation; Sulphidation
Categories
Funding
- Australian Research Council [DP190101574]
Ask authors/readers for more resources
The corrosion behavior of Fe-based alloys with 25 wt% Cr in CO2-H2O gases at 750 degrees C was studied with and without sulphate deposits. Without sulphate deposits, ferritic alloys outperformed austenitic alloys in terms of corrosion resistance. The effects of sulphate deposits on external scaling and internal sulphidation of the alloys were different, with interactions between sulfur and metal cations at chromia grain boundaries playing a key role.
The corrosion behaviour of several model and commercial Fe-based alloys, all with 25 wt% Cr, in CO2-H2O gases at 750 degrees C with and without sulphate deposits was studied. In the absence of sulphate deposits, ferritic alloys Fe-25Cr and Fe-25Cr-2Mn-1Si outperformed austenitic alloys Fe-25Cr-20Ni and 310 stainless steel. This pattern of behaviour is explained from the viewpoint of chromia and silica layer formation, using approximate analyses based on well-established diffusion models. Sulphate deposits exerted different effects on external scaling and internal sulphidation of the ferritic and austenitic alloys. Interactions between sulphur and metal cations at chromia grain boundaries are considered to be responsible for these effects.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available