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Effect of Nb content on corrosion behavior of Ti-based bulk metallic glass composites in different solutions

机译：铌含量对不同溶液中钛基大块金属玻璃复合材料腐蚀行为的影响

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摘要

The effect of Nb content on the corrosion behavior of in-situ (Ti0.45Zr0.31Be0.17Cu0.07)(100-x)Nb-x (x = 4, 6, 8, 10, and 12) was evaluated in 0.5 mol/L H2SO4, 0.6 mol/L NaCl, and 1 mol/L NaOH solutions. A dual-phase microstructure which composed of an amorphous matrix and dendrites was observed. Electrochemical measurements in each corrosion medium showed the same trend. The corrosion resistance first increased and then decreased with the addition of Nb content from 4 to 12 at.%. The results show the best corrosion resistance in terms of x = 8 for the alloys. Notably, Nb addition improved the pitting-corrosion resistance of samples in a chloride-containing solution, whereas spontaneous passivation occurred in chloride-free solutions. A preferential solution was observed in the amorphous matrix region in NaCl solution, but a part of dark spots and dents appeared on the surface after the polarization in chloride-free solutions. X-ray photoelectron spectroscopic measurements showed that Nb addition promoted the formation of metal oxide on the surface film, thus inducing a superior corrosion resistance for the bulk metallic glass matrix composites.
机译：以0.5评估了Nb含量对原位（Ti0.45Zr0.31Be0.17Cu0.07）（100-x）Nb-x（x = 4，6，8，8，10和12）腐蚀行为的影响mol / L的H2SO4、0.6 mol / L的NaCl和1 mol / L的NaOH溶液。观察到由非晶基质和树枝状晶体组成的双相微观结构。在每种腐蚀介质中的电化学测量显示出相同的趋势。随着Nb含量从4到12 at。％的增加，耐腐蚀性首先增加，然后降低。结果表明，合金的x = 8值具有最佳的耐腐蚀性。值得注意的是，添加Nb改善了样品在含氯化物溶液中的耐点蚀性，而在无氯化物溶液中发生了自发钝化。在NaCl溶液中的非晶态基质区域中观察到优先溶液，但是在无氯溶液中极化后，表面上出现了一部分黑点和凹痕。 X射线光电子能谱测量表明，添加Nb促进了表面膜上金属氧化物的形成，从而为块状金属玻璃基复合材料带来了优异的耐腐蚀性。

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  • 来源
    《Applied Surface Science》 |2019年第31期|108-117|共10页
  • 作者

    Yang Y. J.; Fan X. D.; Wang F. L.; Qi H. N.; Yue Y.; Ma M. Z.; Zhang X. Y.; Li G.; Liu R. P.;

  • 作者单位

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Henan Univ Sci & Technol, Natl United Engn Lab Adv Bearing Tribol, Luoyang 471023, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Ti-based bulk metallic glass composites; Corrosion characteristics; X-ray photoelectron spectroscopy; Corrosion dynamics;

    机译：钛基块状金属玻璃复合材料腐蚀特性X射线光电子能谱腐蚀动力学;

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