研究了0.9%NaCl生理液、Hank's模拟体液和Tyrode's模拟血液的pH值和Cl-离子浓度对医用NiTi形状记忆合金Ni离子腐蚀溶出的影响.结果表明,三种模拟体液的氧化还原电位不同,使Ni离子释放呈现出差异,Tyrode's模拟血液中Ni离子释放量较高;随着pH值的增大Ni的Flade电位降低,从而使Ni离子释放量降低;随着Cl-浓度增加,Ni离子释放量增大,呈现出较强的Ni选择性腐蚀行为,而Ti的腐蚀微弱,点蚀是其主要的腐蚀形式.
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