为了探索较为理想的NiTi合金电化学抛光工艺,采用一种改进的冰醋酸-高氯酸基抛光液,对其进行了电化学抛光.采用SEM和表面轮廓仪考察了抛光液成分以及各工艺参数对NiTi合金微观形貌和表面粗糙度的影响.试验结果表明,抛光液成分在电化学抛光中起着关键的作用,并且当电流密度为1.0A/cm2、抛光液温度为0 ℃、抛光时间为45 s、阴阳极间距为1.5 cm时,电化学抛光效果比较理想,表面粗糙度降为70 nm左右.与未抛光试样相比,电化学抛光后NiTi合金表面光滑均匀,基本无缺陷.
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