( 1. 大连理工大学 化工学院， 大连 116012；
2. 中国科学院 金属研究所金属腐蚀与防护国家重点实验室，
沈阳 110016)
摘 要: 采用化学失重法、 电化学方法和原子吸收光谱法研究了紫铜、 Cu-Zn-Al形状记忆合金和Cu-Zn-Al合金在模拟宫腔液中的腐蚀行为。结果表明， 模拟宫腔液中紫铜、 Cu-Zn-Al形状记忆合金和Cu-Zn-Al合金的腐蚀历程受阴极氧去极化步骤控制。 Cu-Zn-Al形状记忆合金和Cu-Zn-Al合金由于铝的表面离子化倾向比锌的大，优先形成致密坚固的保护性氧化铝膜， 降低了腐蚀速率。 在模拟宫腔液中发现Cu-Zn-Al形状记忆合金和Cu-Zn-Al合金发生脱铝腐蚀， Cl-参与腐蚀反应历程，促进脱铝腐蚀的进行。 白蛋白与氧的竞争吸附加速了阳极溶解， 使紫铜、 Cu-Zn-Al形状记忆合金和Cu-Zn-Al合金的阳极活性电流密度随白蛋白浓度的上升而增加。
关键字: Cu-Zn-Al形状记忆合金; 模拟体液; 脱铝腐蚀
（ 1. School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China;
2. State Key Laboratory for Corrosion and Protection,
Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China）
Abstract: Chemical weight-loss method, electrochemical test technology and atomic adsorption spectrometry were used to investigate corrosion behaviors of copper, Cu-Zn-Al shape memory alloy(SMA) and Cu-Zn-Al alloy in simulated uterine fluid. The results show that corrosion process of copper, Cu-Zn-Al SMA and Cu-Zn-Al alloy in simulated uterine fluid is controlled by cathodic depolarization of oxygen. The corrosion rates of Cu-Zn-Al SMA and Cu-Zn-Al alloy are lower than that of copper result from ionization tendency of aluminum exceeding zinc, forming compact solidity protective alumina film. Dealuminufication corrosion occurs in Cu-Zn-Al SMA and Cu-Zn-Al alloy. Cl- takes part in the dealuminufication corrosion process and accelerated this reaction. Competitive adsorption of albumin and oxygen accelerate anodic reaction, which lead anodic active currents of copper and Cu-Zn-Al SMA to rise with increasing albumin concentration.
Key words: Cu-Zn-Al shape memory alloy; artificial body fluid; dealuminufication corrosion
