采用NH4HF2-HNO3光整液对钛合金(TC4)进行化学光整研究,利用台阶仪测得粗糙度值或测定样品反射率来确定表面质量,分析了化学液组成、光整温度、光整时间和添加剂选择及用量对光整质量的影响,获得了较合理的工艺参数:NH4HF2 (16%)5mL、H2O2 (40%)11mL、C6H12N4 (16%) 2mL、HNO3 (65%~80%) 11mL、添加剂1mL.光整时间为2.5min,光整温度为20℃.通过极化实验和PBS浸泡实验验证钛合金光整前后的耐蚀性能,结果表明在提高钛合金表面质量的同时也增强了其抗腐蚀性能,采用此工艺可对结构复杂的医用钛合金表面进行光整加工.
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