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电化学  2014 

酸性化学镀镍磷合金的动力学机理

DOI: 10.13208/j.electrochem.140321, PP. 576-581

Keywords: 化学镀,极化,电化学机理,混合电势理论,沉积速率

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Abstract:

通过极化曲线研究了3种不同溶液(阴极液、阳极液和完整镀液)的电化学行为,测定了主盐、还原剂浓度以及镀液pH和体系温度对化学镀镍沉积速率的影响.与直接在镁合金上化学镀镍并使用重量分析法得到的沉积速率相比较发现,完整镀液体系的极化曲线才能真实地反映化学镀镍的沉积过程,其过程不能简单视为由彼此完全独立毫无关联的阴阳极半反应构成.根据Butler-Volmer公式,本化学镀液体系的化学镀镍过程属混合控制,其表观反应活化能为42.89kJ·mol-1.

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