采用X射线衍射(XRD)、扫描电镜(SEM)、能谱分析(EDS)研究了脉冲电沉积法制备的纳米晶Ni-Co合金镀层及其纳米SiC/Ni-Co复合镀层的组织结构、表面形貌和成分.用浸泡法和电化学极化法对比测试了纳米晶Ni-Co合金镀层和纳米SiC/Ni-Co复合镀层在3.5 wt%NaCl和5 wt%HCl溶液中的腐蚀行为.研究结果表明:通过脉冲电沉积法制备的Ni-Co合金镀层和纳米SiC/Ni-CO复合镀层具有典型的纳米晶结构;随着纳米SiC颗粒的增加,复合镀层的晶粒尺寸减小,硬度增加.所制备的纳米SiC/Ni-CO复合镀层颗粒分散均匀,其在3.5 wt%NaCl和5 wt%HCl溶液中的耐蚀性均优于纳米晶Ni-Co合金镀层.纳米晶Ni-Co合金镀层和纳米SiC/Ni-Co复合镀层在3.5 wt%NaCl溶液中的腐蚀速率极低,表现出极好的耐腐蚀性能,而在5 wt%HCl溶液中的腐蚀形态则表现为点蚀.
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