Advanced nuclear processes and facilities (e.g., transmutation of nuclear waste, fast reactors, and spallation neutron sources) impose special demands on materials, which must withstand high temperatures, high radiation fields, and chemical corrosion. Proposed schemes for transmuting nuclear waste require a nonmoderating coolant such as lead-bismuth eutectic (LBE). While LBE corrodes most steels, small amounts of oxygen in the LBE greatly reduces the corrosion rate, and could ideally re-grow a damaged oxide layer in-situ. The protective oxide layer would thus be self-healing. However, the fundamental understanding of the role of oxygen and passivating oxide layers is presently incomplete.
During the present reporting period, gas-phase experiments were conducted, in which steel samples were oxidized in glass capsules at elevated temperatures in a tube furnace. Corroded steel samples were analyzed from a variety of sources, including the Delta loop at LANL and samples corroded at UNLV in the gas phase experiments.
Corrosion and anti-corrosives; Eutectic alloys; Lead-bismuth alloys; Metallurgical laboratories – Design and construction; Metals—Cold working; Nuclear reactors — Materials — Testing; Steel — Corrosion
Materials Science and Engineering | Metallurgy | Nuclear Engineering | Oil, Gas, and Energy
Johnson, A. L.,
Perry, D. L.
Fundamental and Applied Experimental Investigations of Corrosion of Steel by LBE under Controlled Conditions: Kinetics, Chemistry Morphology, and Surface Preparation.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_sciences_materials/126