目前,添加剂对镀锌的作用及其机理说法不同.用线性扫描法、循环伏安法和计时电流法分别研究了聚乙二醇400(PEG400)及其与苄叉丙酮(BA)复配在氯化钾(KCl)溶液中对锌电沉积的影响;根据Scharifker-Hills成核模型拟合了电流-时间数据.结果表明:PEG400和BA混合比单加更能增大锌在KCl溶液中电沉积的过电位,能更有效地抑制析氢反应;锌的电沉积机理在一定程度上取决于所加入的添加剂,仅添加PEG400,锌电沉积机理与无添加剂的一样,都是晶核瞬时形成和成长的过程,PEG400和BA同时加入,锌的电沉积机理是晶核连续形成后转为晶核瞬时形成.本研究结果有助于氯化钾镀锌高效添加剂的开发.
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