镍对钛基非晶合金腐蚀行为的影响
毕业论文关键词 非晶合金；腐蚀；电化学性能；钛合金
Title The effect of Ni-addition on the corrosion behavior of Ti-based metallic glasses
Abstract Recently，the research on the amorphous alloys have attracted much interesting due to their excellent properties．It is quite important to further study the corrosion behavior of the amorphous alloys in theory and application．Ti60Cu40-x Nix（x=1,5,10）amorphous alloys were prepared by arc-melting method and melt spinning. The microstructure of prepared amorphous alloys was analyzed by X-ray diffraction (XRD). The corrosion behaviors of Ti60Cu40-x Nix（x=1,5,10） amorphous alloys in 0.144 mol/L NaCl solution, 0.1 mol/L H2SO4 solution and 0.5 mol/L NaOH solution were studied by the potentiodynamic polarization curves and electrochemical impedance spectrum (EIS). As the potentiodynamic polarization curves shows, in 0.144 mol/L NaCl solution, the amorphous alloy Ti60Cu40-x Nix （x=1,5,10） exhibits spontaneous passivation, with a lower passive current density, from 10-5 A / cm2 to 10 -6A / cm2, and the passive potential region between 450mV and 700mV. Meanwhile the increasing of Ni content can effectively increase the pitting potential. In 0.1 mol/L H2SO4 and 0.5 mol/L NaOH solutions, the alloy composition of the Ti-Cu-Ni amorphous alloy has little effect on the corrosion behavior. Furthermore, all the three samples exhibit a wide passive potential region during the anodic polarization process.
Keywords Ti-based amorphous alloy; corrosion; electrochemical properties;
目次
1绪论..1
2钛基非晶合金发展史及性能2
2.1钛基非晶合金的发展史2
2.2钛基非晶合金的性能..2
2.3非晶合金的腐蚀性能..2
2.3.1金属的腐蚀理论..2
2.3.2金属钝化理论.3
2.3.3影响电化学腐蚀的因素..3
2.4添加的元素对非晶合金腐蚀的影响..4
2.5镍的耐蚀性分析5
3实验方法和测试技术6
3.1实验材料6
3.2制备工艺6
3.2.1母合金的熔炼..6
3.2.2非晶合金试样的制备.6
3.3实验设备与实验试剂..7
3.3.1电化学分析测试仪7
3.3.2三电极系统7
3.3.3实验试剂..8
3.4结构测试分析..8
4镍对钛基非晶合金腐蚀行为的影响9
4.1合金化学成分设计.9
4.2制备过程9
4.3样品的测试分析9
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