Title :
A comparison of two aluminizing methods for corrosion protection in the wet seal of molten carbonate fuel cells
Author :
Bloom, Ira ; Indacochea, J. Ernesto ; Krumpelt, Michael ; Benjamin, Thomas G.
Author_Institution :
Div. of Chem. Technol., Argonne Nat. Lab., IL, USA
fDate :
27 Jul-1 Aug 1997
Abstract :
The corrosion of aluminized Type 310S stainless steel in the wet seal of molten carbonate fuel cells was investigated. Samples prepared with two aluminizing methods were used: thermal spray and slurry coating. At first, the diffusion of Fe and Cr into the aluminum is limited to the interfacial area. With time at 650°C, Fe and Cr aluminides precipitate in the Al layer. The slurry-coated layer contains a higher concentration of FeAl and Fe3Al than does the thermal spray layer. Because of the high iron content, the corrosion protection of the slurry layer is lower than that of the thermal spray layer
Keywords :
aluminium; corrosion protective coatings; fuel cells; precipitation (physical chemistry); seals (stoppers); spray coating techniques; stainless steel; 650 C; Al layer; Cr aluminides; Fe aluminides; Fe3Al; FeAl; aluminized Type 310S stainless steel; aluminizing methods; corrosion protection; high iron content; interfacial area; molten carbonate fuel cells; precipitation; slurry coating; thermal spray coating; wet seal; Chromium; Coatings; Corrosion; Fuel cells; Iron; Protection; Seals; Slurries; Steel; Thermal spraying;
Conference_Titel :
Energy Conversion Engineering Conference, 1997. IECEC-97., Proceedings of the 32nd Intersociety
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-4515-0
DOI :
10.1109/IECEC.1997.660265
