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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(4) [August 2011] >
| Title: | Study of parabolic rate constant for coated AISI 430 steel with Mn3O4 and MnFe2O4 spinels |
| Authors: | Ebrahimifar, Hadi
Zandrahimi, Morteza |
| Keywords: | Parabolic rate constant
AISI 430 ferritic stainless steel
Oxidation
Solid oxide fuel cell (SOFC) |
| Issue Date: | Aug-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The
oxidation resistance of AISI 430 ferritic stainless steels which are used as interconnects
in solid oxide fuel cells (SOFCs) for the intermediate temperature operation can
be improved with a protective coating layer. In this study, the pack cementation
method is employed to coat AISI 430 ferritic stainless steel. Isothermal oxidation,
cyclic oxidation and oxidation at different temperatures (600-900°C) are applied
to evaluate the parabolic rate constant. The coated samples demonstrated lower
parabolic rate constant (kp)
in each test and it indicates that the coating layer has acted as a mass barrier
against the outward diffusion of cations specially chromium. XRD analysis revealed
that the formation of Mn3O4 and MnFe2O4 spinels
during oxidation caused to the improvement of the oxidation resistance. |
| Page(s): | 314-320 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(4) [August 2011]
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