A new aluminization method for molten carbonate fuel cell bipolar plate wet seals is described in this paper based on the application of the electrospark deposition (ESD) process. The molten carbonate corrosion behavior of single Al, FeAl, and a dual diffusion coating applied onto a AISI 316L steel sheet of 0.5 mm thickness is examined. FeAl-containing coatings show low-rate corrosion after exposure to a carbonate melt at 650 °C for 1000 h, whereas the single Al coating suffers excessive corrosion. Coatings degradation modes involve interdiffusion phenomena and transient formation of nodule iron–oxides. The dual coating exhibits the best corrosion resistance due to its higher Al surface content. Characteristics of the ESD coatings in terms of thickness, uniformity, and composition are also reported.
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February 2005
This article was originally published in
Journal of Fuel Cell Science and Technology
Article
Development of a New Aluminizing Method for Molten Carbonate Fuel Cell Wet Seals
S. Frangini,
S. Frangini
ENEA CRE Casaccia, Hydrogen and Fuel Cells Project
, Via Anguillarese 301, 00060 Rome, Italy
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S. Frangini
ENEA CRE Casaccia, Hydrogen and Fuel Cells Project
, Via Anguillarese 301, 00060 Rome, Italy
S. Loreti
ENEA-Frascati FIS-LAS
A. Masci
ENEA MAT-TEC
J. Fuel Cell Sci. Technol. Feb 2005, 2(1): 60-64 (5 pages)
Published Online: July 30, 2004
Article history
Received:
June 23, 2004
Revised:
July 29, 2004
Accepted:
July 30, 2004
Citation
Frangini, S., Loreti, S., and Masci, A. (July 30, 2004). "Development of a New Aluminizing Method for Molten Carbonate Fuel Cell Wet Seals." ASME. J. Fuel Cell Sci. Technol. February 2005; 2(1): 60–64. https://doi.org/10.1115/1.1843119
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