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## Abstract The effect of cerium on the high-temperature oxidation behavior of low sulfur martensitic stainless steel 1Cr13Mo was investigated at 700°C, 800°C and 900°C in air, and then analyzed by means of X-ray diffraction, energy dispersive X-ray spectroscopy and electron probe microanalysis. The external scales formed on samples are composed of Cr~2~O~3~ and MnCr~2~O~4~ at 700°C and 800°C. When at 900°C, only __M__~2~O~3~ type oxide can be found in the scale of the sample without cerium, and there is still some MnCr~2~O~4~ that can be detected in the scale of the sample containing cerium, showing cerium benefits forming MnCr~2~O~4~ which makes the scale more protective. After oxidation at 900°C, in the sample containing cerium, segregation of cerium and chromium is found near the metal/scale interface, which indicates that cerium reduces the oxidation rate by modifying the transport process, changing the transportation mechanism from Cr^3+^ ions' outward diffusion into O^2−^ anions' inward diffusion. Meanwhile, the sample containing cerium shows a smaller number of pores and lower sulfur content near the interface compared with the sample without cerium, which suggests that cer

Author

Yabo Li; Donghao Wang; Jipeng Zhao

Publisher

Walter de Gruyter GmbH

Published

2019