铁和铈对铝在3.5%NaCl溶液中腐蚀行为的影响  

Effects of Fe and Ce on Corrosion Behaviors of Aluminum in 3.5% NaCl Solution

作　　者：陈红梅[1] 范常有[1] 赵茂密[1] 钟夏平[2] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004 [2]广西科学院,广西南宁530007

出　　处：《广西科学》2011年第2期153-157,共5页Guangxi Sciences

基　　金：国家自然科学基金项目(50761002);广西青年基金项目(0832007);广西研究生教育创新计划项目(105930903079)资助

摘　　要：采用高频熔炼方法制备Al-Fe-Ce合金,通过X射线衍射仪、金相显微镜、电化学工作站等对制备的合金结构、动电位线性扫描极化曲线、浸泡与电化学腐蚀前后表面形貌的变化进行研究,并分析Al-Fe-Ce合金在浓度为3.5%NaCl溶液中耐腐蚀性能。结果表明:在3.5%NaCl溶液中腐蚀,Cl-致使铝合金容易发生点蚀;稀土Ce的加入能够改善合金微观结构,细化晶粒,减弱Cl-离子对点蚀的影响;合金中Ce的存在能够降低Fe对合金腐蚀性能的损害作用。Al-Fe-Ce alloys were prepared by high-frequency melting.The structure of alloys,potentiodynamic linear polarization cure,and the changes of the surface morphology after immersion and electrochemical corrosion were investigated by X-ray diffraction,metallurgical microscope,and electrochemical analysis.The corrosion characteristic of Al-Fe-Ce alloys in 3.5% NaCl solution was systematically analyzed.The results indicate that the addition of rare earth Ce in aluminum can refine the microstructure of alloy,and reduce the harmful effects of Cl-ions on pitting corrosion resistance.Furthermore,the addition of Ce in aluminum alloys can eliminate the damage of Fe to the corrosion resistance of alloys.

关 键 词：合金 铝-铁-铈 电化学 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]