Long-term corrosion performance of T91 ferritic/martensitic steel at 400 °C in flowing Pb-Bi eutectic with 2 × 10−7 mass% dissolved oxygen

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  • IKET KIT INE - Karlsruhe Institute of : Institute for Nuclear Waste Disposal

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Abstract

Long-term corrosion behavior of T91 ferritic/martensitic steel in oxygen-doped flowing Pb–Bi eutectic is investigated by exposure for up to 20,000 h at 400 °C, 2 m/s and 2 × 10−7mass% dissolved oxygen. The corrosion phenomena and kinetics of interaction are characterized qualitatively and quantitatively. The steel shows major oxidation resulted in the formation of a bilayer Fe3O4 / Fe(Fe,Cr)2O4 scale. After 20,000 h, the scale thickness averages 12.6 ( ± 2.7) μm. The metal recession due to oxidation does not exceed 5 ( ± 1) μm. Besides oxidation, the localized dissolution of the steel is observed reaching of ∼100 μm in depth after 20,000 h.

Details

Original languageEnglish
Article number108852
Pages (from-to)1-11
Number of pages11
JournalCorrosion Science
Volume174
DOIs
Publication statusPublished - 2 Jul 2020

Keywords

  • Steel, Oxidation, Kinetic parameters, Liquid Pb-Bi, Corrosion

ID: 6990815