双向脉冲电沉积法可调控镀层的组成及性能,目前有关双向脉冲法制备SiC/Ni-Co合金复合镀层的报道较少.采用双向脉冲电沉积法制备出了SiC/Ni-Co复合镀层,利用扫描电镜(SEM)和能谱仪(EDS)表征了镀层的微观形貌和组成,并通过全浸腐蚀试验法评估了镀层在3.5％NaCl中性溶液中的耐蚀特性.研究表明:当脉冲频率为20 Hz,平均电流密度为60 mA/cm2,逆向脉冲系数为0.3,占空比为0.6,镀液温度为50℃时,双向脉冲电沉积制得的SiC/Ni-Co镀层较传统的直流电沉积法制备的SiC/Ni-Co镀层更光亮平整、结晶更均匀细密,且SiC的复合与双向脉冲电沉积法的应用对提高镀层的耐蚀性具有积极的作用.
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