在次磷酸钠化学镀镍溶液中研究共同添加3-巯基丙烷磺酸钠和聚乙烯亚胺-5000对化学镀镍的影响,通过线性扫描伏安法研究了添加剂对阳极、阴极极化曲线的影响.结果表明,随着3-巯基丙烷磺酸钠浓度的增加,化学镀镍平均速率增大,当ρ(3-巯基丙烷磺酸钠)达到5mg/L时镀镍平均沉积速率达到最大,在此溶液中继续添加聚乙烯亚胺-5000,发现沉积速率下降,且比单独添加聚乙烯亚胺-5000还小.利用3-巯基丙烷磺酸钠对化学镀镍的加速作用和聚乙烯亚胺-5000的抑制作用,以及其在溶液中低的扩散系数,成功实现了化学镍的完全协同填充.
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