Phase Composition of Oxidised Layers Grown on Steel Exposed to Liquid Lead at 749 K |
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| Authors: | Carbucicchio M Rateo M Martini C Palombarini G Benamati G Fazio C |
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| Institution: | (1) Department of Physics, University, and INFM, 43100 Parma, Italy;(2) Institute of Metallurgy, University, 43136 Bologna, Italy;(3) Energy Department, Fusion Division, ENEA RC Brasimone, 40032 Camugnano (BO), Italy |
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| Abstract: | The corrosion resistance of AISI 316 LN stainless steel was studied in contact with stagnant, oxygen-saturated liquid lead at 749 K for times up to 1200 h. The reaction products were analysed by means of optical and scanning electron microscopy, electron probe microanalysis, X-ray diffraction analysis and Mössbauer spectroscopy. Thin layers of largely variable thickness formed on the surface, mainly consisting of Fe3O4, with small amounts of FeO in the inner regions, Fe2O3 and an Fe-Pb-O ternary product in the outermost regions. The alloying elements Cr and Ni diffused to a different extent into Fe3O4. A mechanism is proposed to explain formation and growth of the reaction products. |
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| Keywords: | stainless steels AISI 316 liquid lead oxidation M?ssbauer spectroscopy |
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