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Microstructure of FeCrAl Thin Film Composed of Nanocrystals Deposited on Zr Alloy and Their Corrosion Behavior Under Water Steam Atmosphere.

Zr alloy cladding materials is the core component of the nuclear reactor, the safety of cladding materials is very important. Zr alloy cladding materials is inclined to react with water under high temperature. The products are ZrO₂ and H₂. The mechanical property of Zr alloy decreases promptly. In order to protect Zr alloy from high temperature water, FeCrAl thin film layer was deposited on Zr alloy surface. The structure, chemical composition, surface elemental valence and morphology of FeCrAl thin film layer were carefully investigated by XRD, EDS, XPS, and SEM. After the test of corrosion experiment, deposition of FeCrAl thin film layer on Zr alloy surface showed the better corrosion property than Zr alloy under high temperature water steam atmosphere. The corrosion rate of Zr alloy with deposited FeCrAl thin film was 1.5 times lower than that of Zr alloy. The deposition of FeCrAl thin film layer on Zr alloy is an efficient approach to improve the corrosion property.