Early stages of dissolution corrosion in 316L and DIN 1.4970 austenitic stainless steels with and without anticorrosion coatings in static liquid lead-bismuth eutectic (LBE) at 500 °C

Evangelia Charalampopoulou, Konstantina Lambrinou, Tom Van der Donck, Boris Paladino, Fabio Di Fonzo, Clio Azina, Per Eklund, Stanislav Mráz, Jochen M. Schneider, Dominique Schryvers, Rémi Delville

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2 Citations (Scopus)

Abstract

This work addresses the early stages (≤1000 h) of the dissolution corrosion behavior of 316L and DIN 1.4970 austenitic stainless steels in contact with oxygen-poor (CO < 10−8 mass%), static liquid lead‑bismuth eutectic (LBE) at 500 °C for 600–1000 h. The objective of this study was to determine the relative early-stage resistance of the uncoated steels to dissolution corrosion and to assess the protectiveness of select candidate coatings (Cr2AlC, Al2O3, V2AlxCy). The simultaneous exposure of steels with intended differences in microstructure and thermomechanical state showed the effects of steel grain size, density of annealing/deformation twins, and secondary precipitates on the steel dissolution corrosion behavior. The findings of this study provide recommendations on steel manufacturing with the aim of using the steels to construct Gen-IV lead-cooled fast reactors.

Original languageEnglish
Article number111234
Number of pages26
JournalMaterials Characterization
Volume178
Early online date1 Jun 2021
DOIs
Publication statusPublished - 1 Aug 2021

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