Oxidation studies of Fe10CrAl-RE alloys exposed to Pb at 550 degrees C for 10,000 h
Journal article, 2013

Five experimental FeCrAl-RE alloys have been exposed up to 10,000 h in stagnant liquid Pb at 550 C. The test matrix consisted of three 10 wt.% Cr alloys, with an Al content ranging from 4 to 8 wt.% (10Cr-4Al, 10Cr-6Al and 10Cr-8Al), one alloy without additions of reactive elements (RE) (10Cr-6Al), and one reference alloy with 21 wt.% Cr and 5 wt.% Al (21Cr-5Al). The evaluation showed a clear difference in oxidation properties, and it was possible to divide the alloys into two distinct groups. A critical Al concentration in the interval of 4-6 wt.% at the given RE content was required to form a thin protective oxide. However, the absence of RE addition in one of the two 10Cr-6Al alloys resulted in a significant reduction in oxidation resistance, comparable with 10Cr-4Al. None of the alloys were severely corroded, however Pb penetrated to a relatively large extent into the porous oxide of the low performing alloys. A 100 nm thick oxide scale, partly consisting of alumina (Al2O3), was observed for the high performing 10Cr-6Al alloy. The Fe10CrAl-RE alloys showed overall very good corrosion resistance and are hence a promising new alloy category for liquid Pb applications. (C) 2013 Elsevier B.V. All rights reserved.

corrosion behavior

kanthal af


al alloys


liquid lead-bismuth

spinodal decomposition


surface-treated steels



J. Ejenstam

Royal Institute of Technology (KTH)

Mats Halvarsson

Chalmers, Applied Physics, Materials Microstructure

Jonathan Weidow

Chalmers, Applied Physics, Materials Microstructure

B. Jonsson


P. Szakalos

Royal Institute of Technology (KTH)

Journal of Nuclear Materials

0022-3115 (ISSN)

Vol. 443 1-3 161-170

Subject Categories

Materials Engineering



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