Abstract
The microstructural evolution and corrosion resistance of the ZrO2 coated ferritic/martensitic (F/M) steel was investigated in static liquid lead-bismuth eutectic (LBE) at 450–650 ℃. The as-deposited coating is composed of the m-ZrO2 phase with a uniform and dense surface morphology. After corrosion, the coatings displayed good phase stability. At the temperature below 550 ℃, the coatings remained intact and dense without dissolution corrosion and lead-bismuth penetration. At 650 ℃, an Fe-rich oxides layer was observed beneath the ZrO2 coating due to the outward diffusion of Fe ions. However, the low corrosion rate of the coated steel substrates seems to be beneficial for improving the corrosion resistance of the structural materials in a liquid lead-cooled system.
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