采用微弧氧化技术在TC4钛合金表面制备了多孔陶瓷层,研究了其在Hank's模拟体液中的电化学腐蚀行为,利用SEM和XRD分析了其表面形貌和物相组成.结果表明,微弧氧化合金的自腐蚀电位升高约0.3 V,提高了TC4钛合金在生物体液环境下的化学稳定性.在钛合金植入体电位范围内,微弧氧化处理可明显提高极化电阻,减少腐蚀电流1～2个数量级.随腐蚀时间的延长,TC4钛合金表面钝化膜逐渐发生腐蚀,而微弧氧化膜浸泡初期HA的形核及生长是电极反应中最活跃部分,2周后表面形成均匀的HA薄膜,表现出良好的抗电化学腐蚀性能.
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