Long term corrosion resistance of alumina forming austenitic stainless steels in liquid lead
2015 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 461, 164-170 p.Article in journal (Refereed) Published
Alumina forming austenitic steels (AFA) and commercial stainless steels have been exposed in liquid lead with 10-7 wt.% oxygen at 550 °C for up to one year. It is known that chromia forming austenitic stainless steels, such as 316L and 15-15 Ti, have difficulties forming protective oxides in liquid lead at temperatures above 500°C, which is confirmed in this study. By adding Al to austenitic steels, it is in general terms possible to increase the corrosion resistance. However this study shows that the high Ni containing AFA alloys are attacked by the liquid lead, i.e. dissolution attack occurs. By lowering the Ni content in AFA alloys, it is possible to achieve excellent oxidation properties in liquid lead. Following further optimization of the microstructural properties, low Ni AFA alloys may represent a promising future structural steel for lead cooled reactors.
Place, publisher, year, edition, pages
2015. Vol. 461, 164-170 p.
Alloy steel, Alloys, Alumina, Austenite, Austenitic stainless steel, Austenitic steel, Building materials, Corrosion, Corrosion resistance, Nickel, Titanium oxides, Chromia, Lead-cooled reactor, Liquid lead, Micro-structural properties, Ni content, Oxidation properties, Protective oxides, Structural steels
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-157859DOI: 10.1016/j.jnucmat.2015.03.011ISI: 000355023900021ScopusID: 2-s2.0-84925355830OAI: oai:DiVA.org:kth-157859DiVA: diva2:772458
QC 20150522. Updated from manuscript to article in journal.2014-12-172014-12-172015-06-16Bibliographically approved