The compatibility of ferritic oxide dispersion strengthened (ODS) steels with static liquid Pb at 650°C was investigated for up to 1750 h. The dependence of corrosion behavior on oxygen concentration in the melt and steel structure was determined. The interaction mode changed from intensive oxidation in the oxygen-saturated melt, accompanied by the formation of a bi-layer magnetite/spinel scale, to formation of a thin Cr-based oxide film in oxygen-doped melt and to the severe steel dissolution in oxygen-free lead. The viability of the in-situ formed Cr-based oxide film, as a promising way to improve the corrosion resistance of steels in the high-temperature (T > 550°C) lead melts is discussed.
Volume Subject Area:
Nuclear Fuel and Materials
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