FeCo基大块非晶合金的电化学与盐雾腐蚀研究  

Electrochemical and Salt Spray Corrosion of Fe Co-Based Bulk Amorphous Alloys

作　　者：陈庆军[1] 蒋薇[1] 张法碧[2] 董应虎[1] 周贤良[1] 

机构地区：[1]南昌航空大学,江西南昌330063 [2]佐贺大学

出　　处：《稀有金属材料与工程》2016年第9期2322-2326,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51261021;51264033);江西省科技落地计划项目(KJLD13056)

摘　　要：通过电化学测试与中性盐雾腐蚀研究了Fe_(24+x)Co_(24-x)Cr_(15)Mo_(14)C_(15)B_6Y_2(x=0,2,4,6,17)块体非晶合金的耐蚀性。合金在1 mol/L HCl中出现了宽的钝化区,其EIS图谱均由单一容抗弧组成,显示出良好耐蚀性;结合极化曲线与交流阻抗结果分析表明,合金耐蚀性随着Co含量的增加先增大后减小,当Co含量为20at%时(x=4)合金耐蚀性最好。利用能谱分析(EDS)与原子力显微镜(AFM)对合金的中性盐雾腐蚀结果进行分析表明,它们的腐蚀产物主要由铁和钴的氧化物以及它们的氯化物组成。同时FeCo基大块非晶合金腐蚀程度随着Co含量的变化而变化,其盐雾腐蚀耐蚀性规律与电化学腐蚀耐蚀性规律一致。The corrosion resistance of Fe24＋xCo24-xCr15Mo14C15B6Y2（x=0,2,4,6,17） bulk amorphous alloy was investigated by electrochemical tests and neutral salt spray corrosion. The alloy forms a wide passivation zone in 1 mol/L HCl, and its EIS spectra are composed of a single capacitive loop, showing a good corrosion resistance. Combined with the results of polarization curves and AC impedance analysis, it suggests that the corrosion resistance of the alloy increases first and then decreases with the increasing of Co content. It gets the best corrosion resistance when the Co content is 20 at%. EDS and atomic force microscopy（AFM） were used to analyze the salt spray corrosion result. It indicates that the corrosion products are mainly composed of iron and cobalt oxides and their chlorides. Meanwhile, the corrosion degree of Fe Co-based bulk amorphous alloys changes with the variation of Co content, and its salt spray corrosion resistance rule is consistent with the electrochemical corrosion resistance rule.

关 键 词：FeCo基大块非晶合金 耐蚀性 电化学腐蚀 盐雾腐蚀 

分 类 号：TG139.8[一般工业技术—材料科学与工程]