Zr-Cu-Al-Ni-Sr非晶合金的腐蚀行为研究  

CORROSION BEHAVIOR OF AMORPHOUS Zr-Cu-Al-Ni-Sr ALLOY

作　　者：叶陈清[1] 林昌健[1] 

机构地区：[1]厦门大学化学化工学院化学系,固体表面物理化学国家重点实验室,厦门361005

出　　处：《腐蚀科学与防护技术》2009年第2期143-145,共3页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(No.50731004)

摘　　要：通过与18-8不锈钢对比,研究了Zr-Cu-Al-Ni-Sr非晶合金的腐蚀行为,用XRD、极化曲线、电化学交流阻抗谱研究了其非晶合金的结构、耐蚀性能和电极反应动力学过程,并用Mott-Schottky曲线法研究了其钝化膜的半导体特性.结果表明,与18-8不锈钢相比,该非晶合金的钝化膜不具备半导体特性,Sr的加入降低了锆基合金的玻璃态形成能力,进而急剧地降低该非晶合金耐蚀性,特别是耐氯离子侵蚀能力.Amorphous Zr-A1-Ni-Cu alloy is a best glass forming system by casting with relatively low cooling rates. A small amount of additive element may seriously influence its corrosion behavior. The microstructure, corrosion resistance and the electrode dynamic process of the amorphous Zr-Cu-Al-Ni-Sr alloy were studied by X-ray diffraction （XRD）, potentiodynamic polarization curves and electrochemical impedance spectroscopy（EIS） respectively. The Mott-Schottky analysis was also employed to study the passive film of amorphous alloy. It is shown that the passive film does not exhibit any semiconducting characters, in comparison with the passive film of 18-8 stainless steel. The addition of small amount of Sr distinctly decreases the corrosion resistance of the amorphous alloy in chloride solutions. It was mainly attributed to that the additive element Sr reduced the glass-forming ability of the system.

关 键 词：非晶合金 Mott—Schottky分析 腐蚀行为 电化学阻抗谱 

分 类 号：TG174.9[金属学及工艺—金属表面处理]