Ni-Mo alloying of nickel surface by alternating pulsed electrolysis using molybdenum(VI) baths
Ni-Mo alloying of nickel surface by alternating pulsed electrolysis using molybdenum(VI) baths
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DOI：
10.1016/j.electacta.2007.03.063
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发表时间：
2007-05
影响因子：
6.6
通讯作者：
Shunsuke Yagi;A. Kawakami;K. Murase;Y. Awakura
中科院分区：
文献类型：
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作者：
Shunsuke Yagi;A. Kawakami;K. Murase;Y. Awakura
在只含有钼离子（MoO 42-）作为金属离子组分的水溶液中，使用交替脉冲电解研究了镍基材表面的电化学Ni-Mo合金化。在该电化学过程中，镍基材在阳极脉冲期间轻微溶解，从而在基材附近的溶液中提供镍离子，而Ni和Mo在随后的阴极脉冲期间都电沉积在基材表面上。通过基于一组直流电解数据独立地优化阳极和阴极条件，发现通过使用pH 3.0-5.0的MoO 42 −溶液的交替脉冲电解，在镍基底表面形成非晶Ni-Mo合金层。根据平衡计算确定的电解质中离子物种的溶解状态，讨论了Ni-Mo合金形成的条件。
Electrochemical Ni–Mo alloying of the surface of a nickel substrate was investigated using alternating pulsed electrolysis in an aqueous solution containing only molybdate ions (MoO42−) as a metal ion component. In this electrochemical process, the nickel substrate was slightly dissolved during the anodic pulses, providing nickel ions into the solution in the vicinity of the substrate, while Ni and Mo were both electrodeposited on the substrate surface during the subsequent cathodic pulses. Through the optimization of anodic and cathodic conditions independently based on a set of direct-current electrolysis data, amorphous Ni–Mo alloy layers were found to be formed at the surface of the nickel substrate by the alternating pulsed electrolysis using the MoO42−solution of pH 3.0–5.0. The conditions for Ni–Mo alloy formation were discussed in terms of the dissolving regime of ionic species in the electrolytes determined by an equilibrium calculation.