Creep and Corrosion of TP347H Stainless Steel with Aluminum in Molten Carbonate Salt
Author Information
Author(s): Meng Qian, Lai Lin, Rao Wan, Li An, Yu Haicun, La Peiqing
Primary Institution: Lanzhou University of Technology
Hypothesis
The addition of aluminum to TP347H stainless steel will improve its corrosion resistance and creep properties in molten carbonate salts.
Conclusion
Adding aluminum to TP347H stainless steel significantly enhances its corrosion resistance and creep properties at high temperatures.
Supporting Evidence
- The corrosion rate of TP347H with 2.5 wt.% Al was approximately 25% lower than that without Al after 1000 hours.
- The addition of Al promoted the formation of a dense protective layer on the alloy surface during corrosion.
- The alloy with 2 wt.% Al exhibited the best high-temperature tensile properties.
Takeaway
This study shows that adding aluminum to a type of stainless steel helps it resist rusting and bending when it's really hot and in salty liquids.
Methodology
The study involved preparing TP347H stainless steel samples with varying aluminum content and testing their corrosion behavior and creep properties at 650 °C in molten carbonate salts.
Limitations
The study primarily focuses on a specific temperature and does not explore long-term effects beyond 1000 hours of exposure.
Digital Object Identifier (DOI)
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