( 1. 大連理工大學(xué) 化工學(xué)院， 大連 116012；
2. 中國科學(xué)院 金屬研究所金屬腐蝕與防護(hù)國家重點(diǎn)實(shí)驗室，
沈陽 110016)
摘 要: 采用化學(xué)失重法、 電化學(xué)方法和原子吸收光譜法研究了紫銅、 Cu-Zn-Al形狀記憶合金和Cu-Zn-Al合金在模擬宮腔液中的腐蝕行為。結(jié)果表明， 模擬宮腔液中紫銅、 Cu-Zn-Al形狀記憶合金和Cu-Zn-Al合金的腐蝕歷程受陰極氧去極化步驟控制。 Cu-Zn-Al形狀記憶合金和Cu-Zn-Al合金由于鋁的表面離子化傾向比鋅的大，優(yōu)先形成致密堅固的保護(hù)性氧化鋁膜， 降低了腐蝕速率。 在模擬宮腔液中發(fā)現(xiàn)Cu-Zn-Al形狀記憶合金和Cu-Zn-Al合金發(fā)生脫鋁腐蝕， Cl-參與腐蝕反應(yīng)歷程，促進(jìn)脫鋁腐蝕的進(jìn)行。 白蛋白與氧的競爭吸附加速了陽極溶解， 使紫銅、 Cu-Zn-Al形狀記憶合金和Cu-Zn-Al合金的陽極活性電流密度隨白蛋白濃度的上升而增加。
關(guān)鍵字: Cu-Zn-Al形狀記憶合金; 模擬體液; 脫鋁腐蝕
（ 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
