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Materials 2014, 7(4), 2772-2783; doi:10.3390/ma7042772

Investigation on the Enhanced Oxidation of Ferritic/Martensitic Steel P92 in Pure Steam

1,* , 1
1 State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China 2 Tubular Goods Research Institute of China National Petroleum Corporation, Xi'an 710077, Shaanxi, China 3 State Grid Liaoning Electric Power Research Institute, Shenyang 110006, Liaoning, China
* Author to whom correspondence should be addressed.
Received: 17 December 2013 / Revised: 23 January 2014 / Accepted: 25 March 2014 / Published: 3 April 2014
(This article belongs to the Special Issue Corrosion of Materials)
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Oxidation of ferritic/martensitic steel P92 was investigated in pure oxygen and in pure steam at 600–800 °C by thermogravimetric analysis (TGA), optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The results showed that the oxidation of P92 was significantly enhanced and multilayer scale with an outer iron oxides layer formed in pure steam. At 700 °C, the gas switch markedly influenced the scaling kinetics and scale microstructure. It was supposed that the higher affinity of iron to steam would be attributed to the enhanced oxidation of P92 in pure steam, and the much easier transport of hydroxyl would account for the significant difference induced by gas switch.
Keywords: Fe–Cr alloys; high temperature oxidation; steam oxidation; TGA Fe–Cr alloys; high temperature oxidation; steam oxidation; TGA
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yuan, J.; Wu, X.; Wang, W.; Zhu, S.; Wang, F. Investigation on the Enhanced Oxidation of Ferritic/Martensitic Steel P92 in Pure Steam. Materials 2014, 7, 2772-2783.

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