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Zr-4合金表面氧化膜的電化學(xué)阻抗譜特征
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國(guó)家自然科學(xué)基金(50771109)；武器裝備預(yù)研基金(9140C700401803)


EIS Characterization of the Oxide Film on Zr-4 Alloy Surface in Super-Heated Steam
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國(guó)家“863”基金項(xiàng)目(2007AA06Z316)；吉林大學(xué)研究生“985工程”創(chuàng)新計(jì)劃項(xiàng)目(20080208)

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    摘要:

    電化學(xué)阻抗譜是分析鋯合金表面氧化膜結(jié)構(gòu)及其演化行為的有效方法。利用10%HCl溶液研究了鋯合金在400 ℃, 10.3 MPa過(guò)熱蒸汽中腐蝕后的表面氧化膜電化學(xué)阻抗行為。結(jié)果表明：鋯合金過(guò)熱蒸汽腐蝕初期表面氧化膜的阻抗譜為單一容抗弧，隨著腐蝕進(jìn)行而演變?yōu)殡p容抗弧。氧化膜表現(xiàn)為雙層膜結(jié)構(gòu)特征。氧化膜阻擋作用的降低是鋯合金過(guò)熱蒸汽腐蝕發(fā)生轉(zhuǎn)折的一個(gè)原因。鋯合金中第二相粒子對(duì)氧化膜阻抗譜及合金耐蝕性有較大影響

    Abstract:

    Electrochemical impedance spectroscopy (EIS) is a useful approach to characterize the oxide film structure and its evolution behavior for zirconium alloys. Oxide films formed on Zr-4 alloys with different heat treatment in super-heated steam at 400 °C, 10.3 MPa were characterized by EIS in 10% HCl solution. Results show that the EIS plot is one capacitive arc for the initial oxide film on zircaloy surface in super-heated steam, and then it evolves into two capacitive arcs with the corrosion proceeding. The oxide film is of dual-film structure. The corrosion transition of zirconium alloys in super-heated steam is partly related to the decreased protection of the oxide film. The second phase particles in zirconium alloys play an important role in impedance response of oxide films and corrosion resistance of alloys.

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鐘祥玉,楊 波,李謀成,姚美意,周邦新,沈嘉年. Zr-4合金表面氧化膜的電化學(xué)阻抗譜特征[J].稀有金屬材料與工程,2010,39(12):2165~2168.[Zhong Xiangyu, Yang Bo, Li Moucheng, Yao Meiyi, Zhou Bangxin, Shen Jianian. EIS Characterization of the Oxide Film on Zr-4 Alloy Surface in Super-Heated Steam[J]. Rare Metal Materials and Engineering,2010,39(12):2165~2168.]
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  • 收稿日期:2009-12-25
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