Transmission electron microscopy study of complex oxide scales on DIN 1.4970 steel exposed to liquid Pb-Bi eutectic

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Abstract

The deployment of Gen-IV lead-cooled fast reactors requires a good compatibility between the selected structural/cladding steels and the inherently corrosive heavy liquid metal coolant. An effective liquid metal corrosion mitigation strategy involves the in-situ steel passivation in contact with the oxygen-containing Pb-alloy coolant. Transmission electron microscopy was used in this work to study the multi-layered oxide scales forming on an austenitic stainless steel fuel cladding exposed to oxygen-containing (CO ≈ 10−6 mass%) static liquid leadbismuth eutectic (LBE) for 1000 h between 400 and 500 °C. The oxide scale constituents were analyzed, including the intertwined phases comprising the innermost biphasic layer.

Details

Original languageEnglish
Pages (from-to)22-31
Number of pages9
JournalCorrosion Science
Volume147
DOIs
StatePublished - 31 Oct 2018

Keywords

  • A. Stainless steel, B. STEM, B. TEM, C. Liquid metal corrosion, C. Oxidation, C. Internal oxidation

ID: 5495186