块状非晶合金Cu-Zr-Ti-Sn在3.5%NaCl溶液中的腐蚀行为  

CORROSION BEHAVIORS OF BULK AMORPHOUS ALLOY Cu-Zr-Ti-Sn AND ITS CRYSTALLIZED FORM IN 3.5%NaCl SOLUTION

作　　者：陈鹏[1] 秦凤香[1] 张海峰[1] 刘常升[2] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016 [2]东北大学材料与冶金学院,沈阳110004

出　　处：《金属学报》2004年第2期207-210,共4页Acta Metallurgica Sinica

基　　金：国家高技术研究发展规划2001AA331010;国家重点基础研究发展规划G2000067201资助项目

摘　　要：利用电化学极化曲线方法和电化学阻抗谱(EIS)技术研究了CU_(60)Zr_(30)Ti_(10)和(Cu_(60)Zr_(30)Ti_(10))_(99)Sn_1块状非晶合金及其晶化后在3.5％NaCl溶液中的腐蚀行为。极化曲线测试结果表明,(Cu_(60)Zr_(30)Ti_(10)))_(99)Sn-1非晶合金在35.％NaCl溶液中的阳极极化曲线有一定的钝化倾向,且其阳极电流密度较Cu_(60)Zr_(30)Ti_(10)非晶合金的阳极电流密度有所降低;同时EIS结果显示,其电化学反应电阻R_t较Cu_(60)Zr_(30)Ti_(10)的R_t值有所增大,说明添加1％Sn使非晶合金Cu_(60)Zr_(30)Ti_(10)的耐蚀性能有所改善,相应成分晶化后的合金与非晶合金的极化曲线相比较,阳极极化表现出较大的钝化倾向,且阳极电流密度略有降低,晶化后合金的EIS测试显示有两个时间常数,即由高频容抗弧和低频容抗弧构成,晶化后合金与其非晶合金相比较,电化学反应电阻R_t明显增大,表明晶化后合金的耐蚀性能有所提高。Corrosion behaviors of bulk amorphous alloy Cu60Zr30Ti10 and (Cu60Zr30Ti10)(99)Sn-1 and their crystallized forms in 3.5%NaCl solution were studied by potentiodynamic polarization experiments and electrochemical impedance spectroscopy (EIS). The results of potentiodynamic polarization experiment show that the anodic reaction of the amorphous (Cu60Zr30Ti10)(99)Sn-1 has a tendency to passivation, and has lower anodic current density. Moreover, EIS experimental result shows that the amorphous (Cu60Zr30Ti10)(99)Sn-1 alloy has higher charge transfer reaction resistance (R-t) than that of the amorphous Cu60Zr30Ti10. Compared with the amorphous alloys, the crystallized alloys have larger tendency to passivation. EIS results of crystallized alloys show two impedance elements, i.e., high frequency and low frequency capacitive loops. The charge transfer reaction resistances of crystallized alloys are larger than those of amorphous alloys.

关 键 词：Cu-Zr-Ti-Sn块状非晶合金 晶化 电化学阻抗 腐蚀行为 NACL溶液 电化学反应 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG172.5[金属学及工艺—合金]