Oxidation studies of Fe10CrAl-RE alloys exposed to Pb at 550 C for 10,000 h
2013 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 443, no 1-3, 161-170 p.Article in journal (Refereed) Published
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 (Al2O 3), 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.
Place, publisher, year, edition, pages
2013. Vol. 443, no 1-3, 161-170 p.
Al-concentration, Oxidation properties, Porous oxides, Protective oxides, RE additions, Reactive elements, Test matrix, Thick oxides
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-133892DOI: 10.1016/j.jnucmat.2013.07.023ISI: 000327905800022ScopusID: 2-s2.0-84881143124OAI: oai:DiVA.org:kth-133892DiVA: diva2:663413
FunderSwedish Research Council
QC 201311112013-11-112013-11-112014-12-17Bibliographically approved