Authors
Material and Energy Research Center, Karaj, Iran
Abstract
MnCo2O4 Spinel has good properties such as electrical conductivity, thermal and structural stability, as well as good thermal expansion match to ferritic stainless steel interconnects. In this paper we prepared nominal composition of MnCo2O4 by solid state reaction and applied onto the surface of the SUS 430 ferritic stainless steel by electrophoretic deposition. The coated alloy, together with the uncoated as a comparison, is cyclically oxidized in air at 800 ºC for 500h. The surface morphology and oxidation behavior are characterized. The results indicate that the oxidation resistance is significantly enhanced by the protective coating with a parabolic rate constant of 1.96×10-12 (g2.cm−4.s−1). The coating layer acts as an effective barrier against chromium migration into the outer oxide layer and prevents weight gain.
Keywords
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