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Evaluation of the Corrosion Resistance of Fe40Al60 Intermetallics in Molten Carbonate (Li+K)

Evaluation of the Corrosion Resistance of Fe₄₀Al₆₀ Intermetallics in Molten Carbonate (Li+K)

G. Pedroza| A. Martinez-Villafane | M. A. Espinoza-Medina | M. A. Rivera | P. J. Sebastian^*

Centro de Investigación en Materiales Avanzados, División de Ciencia e Ingeniería Ambiental, Miguel de Cervantes 120, Complejo industrial Chihuahua, 31109 Chihuahua

Universidad Politecnica del Estado de Guerrero, Carr. Taxco-Iguala s/n, Col. Arroyo, Taxco de Alarcon, Guerrero

Facultad de Ingeniería Mecánica, UMSNH, Santiago Tapia 403 Col. Centro, C.P. 58000 Morelia, Michoacán

Centro de Investigación en Energía-UNAM, 62580, Temixco, Morelos

Corresponding Author Email:

sjp@cie.unam.mx

Received:

11 August 2011

| |

Accepted:

30 October 2011

| | Citation

v15n01a05_p021-030.pdf

OPEN ACCESS

Abstract:

Alloys of the intermetallic material based on Fe₄₀Al₆₀ and the alloys formed with addition of Ag constitute a new alternative to improve the problems of corrosion resistance and electrical conductivity. The electrochemical characterization was employed to evaluate the corrosion resistance of the materials for being used as bipolar plates in molten carbonate fuel cells (MCFC). These characterizations were done under similar conditions as the working environment of the molten carbonate fuel cell (MCFC). The working environment of the standard molten carbonate fuel cell was simulated by the use of molten salts of 62 mol.% Li₂CO₃ and 38 mol.% K₂CO₃ at the temperature of 650 ºC. Alloys included Fe₄₀Al₆₀ with additions of 1, 3 and 5 weight % of Ag. The results obtained indicate that this material is promising for its use as bipolar plates in MCFC.

Keywords:

molten carbonate fuel cell, bipolar plate, Fe₄₀Al₆₀Intermetallics, Ag

1. Introduction

2. Experimental Procedure

3. Results and Discussion

4. Conclusions

Acknowledgements

This work was carried out as part of the projects IN103410 and 100212 with financial support from DGAPA-UNAM and CONACYT respectively.

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Evaluation of the Corrosion Resistance of Fe40Al60 Intermetallics in Molten Carbonate (Li+K)