Lifetime Evaluation of Al-Fe Coating in Wet-seal Environment of MCFC
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Abstract
Aluminum source in an Al-Fe coating reacts with molten carbonate and develops a protective LiAlO2 layer on the coating surface during operation of molten carbonate fuel cells (MCFC). However, if aluminum content in an Al-Fe coating decreases to a critical level for some reasons during MCFC operation, a stable and continuous LiAlO2 protective layer can no longer be maintained. The aluminum content in an Al-Fe coating can be depleted by two different processes; one is by corrosion reaction at the surface between the aluminum source in the coating and molten carbonate, and the other is inward-diffusion of aluminum atoms within the coating into a substrate. In these two respects, therefore, the decreasing rate of aluminum concentration in an Al-Fe coating was measured, and then the influences of these two aspects on the lifetime of Al-Fe coating were investigated, respectively.
참고문헌 (3)
- W. J. Quadakkers, "Werkstoffe und Korrosion" (1994)
- E. Payne, "Properties of Intermetallic Alloys", chapter 2 (1994), Metal Information Analysis Center
- D. Gupta, "Diffusion Phenomena in Thin Films and Microelectronic Materials", chapter 1 (1988)