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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 effects of Fe_ (24 + x) Co_ (24-x) Cr_ (15) Mo_ (14) C_ (15) B_6Y_2 (x = 0, 2, 4, 6, 17) Corrosion resistance of bulk amorphous alloys. The alloy showed a wide passivation region in 1 mol / L HCl. The EIS spectra of the alloy were composed of a single capacitive arc and showed good corrosion resistance. The polarization curves and AC impedance analysis showed that the corrosion resistance The increase of Co content first increases and then decreases. When the Co content is 20at% (x = 4), the corrosion resistance of the alloy is the best. Analysis of neutral salt spray corrosion of alloys using energy dispersive spectroscopy (EDS) and atomic force microscopy (AFM) shows that their corrosion products consist mainly of iron and cobalt oxides and their chlorides. At the same time, the corrosion degree of FeCo-based bulk amorphous alloy changes with the change of Co content, and the law of salt spray corrosion and corrosion resistance is consistent with that of electrochemical corrosion and corrosion resistance.