Article ID Journal Published Year Pages File Type
1468376 Corrosion Science 2016 13 Pages PDF
Abstract

•High temperature oxidation of a few ferritic steels was investigated as a function of oxygen pressure.•The oxidation rate did not vary significantly with oxygen pressure in the test atmosphere.•The formed oxide scales contained smaller grains in lower oxygen pressure.

Four commercial ferritic stainless steels were tested at 850 °C in oxygen pressures ranging from 10−4 to 1 atm, in order to investigate the isolated effect of oxygen pressure on corrosion, in the context of solid oxide electrolysis cells. The oxidation rates of all steels were essentially independent of oxygen partial pressure, which indicates n-type behavior. FIB/SEM analysis revealed that the grain size of the oxides was found to decrease at lower oxygen pressures. Volatile Cr species evaporation in pure oxygen was significantly lower than what has been reported for simulated solid oxide fuel cell environments with humid air.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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