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Corrosion behavior of Al-surface-treated steels in liquid Pb-Bi in a pot

Kurata, Yuji; Futakawa, Masatoshi  ; Saito, Shigeru   

Corrosion tests were performed in oxygen-saturated liquid Pb-Bi at 450$$^{circ}$$C and 550$$^{circ}$$C in a pot for 3000h for Al-surface-treated steels containing various levels of Cr contents. The Al surface treatments were achieved using a gas diffusion method and a melt dipping method. Al$$_{2}$$O$$_{3}$$, FeAl$$_{2}$$ and AlCr$$_{2}$$ produced by the gas diffusion method exhibited corrosion resistance to liquid Pb-Bi, while the surface layer produced by the melt dipping method suffered a severe corrosion attack. Fe$$_{4}$$Al$$_{13}$$ and Fe$$_{2}$$Al$$_{5}$$ produced by the melt dipping method disappeared during the corrosion test at 550$$^{circ}$$C and only FeAl remained.

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Category:Materials Science, Multidisciplinary

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