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Corrosion interaction of 9%Cr ferritic/martensitic steels at 450 and 550 ?C with flowing Pb-Bi eutectic containing 1E-7 mass % dissolved oxygen

[+] Author and Article Information
Valentyn Tsisar

Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
valentyn.tsisar@kit.edu

Carsten Schroer

Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
carsten.schroer@kit.edu

Olaf Wedemeyer

Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
olaf.wedemeyer@kit.edu

Aleksandr Skrypnik

Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
aleksandr.skrypnik@kit.edu

Jürgen Konys

Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Applied Materials Physics (IAM-AWP), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
juergen.konys@kit.edu

1Corresponding author.

ASME doi:10.1115/1.4041432 History: Received November 28, 2017; Revised August 30, 2018

Abstract

Corrosion behavior of 9 %Cr F/M P92, E911 and EUROFER steels was investigated in flowing (2 m/s) Pb-Bi with 1E-7 mass%O at 450 and 550 °C for up to 8766 and 2011 h, respectively. The steels show mixed corrosion modes simultaneously revealing protective scale formation, accelerated oxidation and solution-based attack. At 450 °C, the accelerated oxidation resulted in a metal recession averaging 6 µm (± 2 µm) after ~ 8766 h while local solution-based corrosion attack ranged from ~40 to 350 µm. At 550 °C, the accelerated oxidation resulted in a metal recession of about 10 µm (± 2 µm) after ~ 2011 h. Solution-based corrosion attack appears more regularly at 550 °C, with a maximum depth ranged from ~90 to 1000 µm. Incubation time for solution based attack at 450 °C is 500-2000 h and ? 300 h at 550 °C.

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