| Abstract |
| In order to investigate the corrosion resistance at the anode side separator for molten carbonate fuel cell, STS310S and SC-STS310S (chromium and aluminum were simultaneously deposited by diffusion into STS310S austenitic stainless steel substrate by pack-cementation process) were used as the separator material. In case of STS310S, corrosion proceeded via three steps; a formation step of corrosion product, a protection step against corrosion, an advance step of corrosion after breakaway. From the standpoint of the behavior of the elements in the specimen, Fe, Cr and Ni were formed richly in the region of corrosion product, in the region of corrosion protection, and at the Cr-deplete zone respectively. Especially, STS310S would be impossible to be used as a separator without suitable surface modification because of rapid corrosion rate after formation of corrosion product, making the severe problem on stability of cell during long-time operation. Whereas, SC-STS310S showed higher corrosion resistance than the present separator, STS310S. And SC-STS 310S can be expected to use for an alternative separator at the anode side by developing coating and pre-treatment process which can lead to dense coating layer and very high corrosion resistance respectively. |
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| Key Words |
| Separator, Molten carbonate fuel cell, Pack-cementation process, Corrosion resistance |
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