Al-Zr-M(M=Fe,Ce和Nd)合金在NaCl溶液中的腐蚀行为研究  

CORROSION BEHAVIORS OF Al-Zr-M(M=Fe,Ce and Nd) In NaCl SOLUTION

作　　者：范常有[1] 张雷[1] 赵茂密[1] 陈红梅[1] 文衍宣[2] 欧阳义芳[1] 

机构地区：[1]广西大学物理科学与工程技术学院,南宁530004 [2]广西大学化学与化工学院,南宁530004

出　　处：《中国腐蚀与防护学报》2010年第6期437-441,共5页Journal of Chinese Society For Corrosion and Protection

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：用电弧熔炼方法制备了Al-Zr-M(M=Fe,Ce和Nd)合金,合金的相结构用XRD进行了分析,通过动电位线性极化法测试了上述合金在3.5%NaCl溶液中的电化学性能,对浸泡后合金的表面形貌用金相显微镜进行了分析。结果表明:Al-Zr合金中加入稀土元素后,在NaCl溶液中的钝化过程更明显,钝化电位更负,合金更易钝化,因而改善了合金的耐腐蚀性能;相比较而言含Nd的合金耐腐蚀性能更好。而Al-Fe-Zr合金为活性极化,腐蚀电流较大,较易腐蚀。Al-Zr-M（M=Fe,Ce and Nd） alloys were prepared by arc melting.The structures of alloys were identified by X-ray diffraction（XRD）.The electrochemical behavior of these alloys was studied by potentiodynamic polarization in 3.5%NaCl solution.The surface morphology of samples after corrosion was analyzed by optical microscope.The results show that the passivation in 3.5%NaCl solution for Al-Zr alloys with rare earth addition was easier than that without addition.The ability of corrosion resistance of alloy with Nd is superior to that with Ce.Because of active polarization,the current density of cathodic polarization for Al-Fe-Zr alloy was large,and low corrosion resistance was low.

关 键 词：铝合金 稀土 电化学 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]