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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Electrochemical behavior of different structural states of the alloy Ti_(60)Ni_(40)
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Electrochemical behavior of different structural states of the alloy Ti_(60)Ni_(40)

机译：Ti_（60）Ni_（40）合金不同结构态的电化学行为

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摘要

Potentiodynamic polarization studies were carried out on nanocrystalline I, nanocrystalline II and nanocrystalline III states having crystallite size 35 ± 5 nm, 18 ± 2 nm and 10 ± 2 nm of the alloy Ti _(60)Ni_(40) in 1 M H_2SO_4 aqueous medium. It was observed that the nanocrystalline III state exhibits superior corrosion resistance as compared to the nanocrystalline II and nanocrystalline I states of the alloy Ti_(60)Ni_(40). XPS studies were also performed after corrosion test and it was observed that nanocrystalline III state contains only Ti~(2+) and Ti~(4+) species whereas nanocrystalline I and nanocrystalline II state contains Ti~(2+), Ti~(3+)and Ti ~(4+) along with some unoxidized metallic Ti~0 in the case of nanocrystalline I state. Thus the small crystallite size and the presence of only Ti~(2+) and Ti~(4+) species in the form of TiO and TiO _2 leads to the formation of a protective oxide film which is adherent, stable and improves the corrosion resistance of the nanocrystalline III state of the alloy Ti_(60)Ni_(40).
机译：在1 M H_2SO_4水溶液中对Ti_（60）Ni_（40）合金的微晶尺寸为35±5 nm，18±2 nm和10±2 nm的纳米晶I，纳米晶II和纳米晶III态进行了电位动力学极化研究。中。观察到，与合金Ti_（60）Ni_（40）的纳米晶II和纳米晶I状态相比，纳米晶III状态表现出优异的耐腐蚀性。腐蚀试验后还进行了XPS研究，发现纳米晶III态仅包含Ti〜（2+）和Ti〜（4+）物种，而纳米晶I和纳米晶II态仅包含Ti〜（2 +），Ti〜（在纳米晶I态的情况下，3+）和Ti〜（4+）以及一些未氧化的金属Ti〜0。因此，较小的微晶尺寸以及仅以TiO和TiO _2形式存在的Ti〜（2+）和Ti〜（4+）物种导致形成粘附，稳定并改善腐蚀的保护性氧化膜。 Ti_（60）Ni_（40）的纳米晶III态的电阻。

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