| 孙博,程江波,刘奇,冯源,梁秀兵.高速电弧喷涂FePSiBNb纳米结构的涂层结构及电化学行为[J].材料导报,2018,32(12):1978-1982, 1987 |
| 高速电弧喷涂FePSiBNb纳米结构的涂层结构及电化学行为 |
| Structure and Electrochemical Behaviors of FePSiBNb Nanostructured Coatings Prepared by High-speed Arc Spraying |
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| DOI：10.11896/j.issn.1005-023X.2018.12.007 |
| 中文关键词: 高速电弧喷涂 涂层 组织 耐蚀性能 |
| 英文关键词: high-speed arc spraying, coatings, microstructure, corrosion resistance |
| 基金项目:国家自然科学基金(51575159) ；江苏省自然科学基金(BK20141416)；江苏省重点研发计划项目(BE2017065) |
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| 摘要点击次数: 1991 |
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| 中文摘要: |
| 采用高速电弧喷涂技术在Q235钢基体表面制备FePSiBNb纳米结构涂层。利用X射线衍射仪(X-ray diffraction, XRD)、场发射电子扫描电镜(Scanning electron microscopy, SEM)、能谱仪(Energy dispersive spectrometer, EDS)和透射电镜(Transmission electron microscope, TEM)对涂层的微观组织结构进行了表征,并系统地研究了涂层在3.5%(质量分数)氯化钠溶液中不同浸泡时间下的电化学腐蚀行为。结果表明:FePSiBNb纳米结构涂层主要由α-Fe相纳米晶组成,平均尺寸为26 nm。涂层呈层状结构且结合紧凑,孔隙率为1.6%。随着浸泡时间的延长,涂层的自腐蚀电位由浸泡1 h时的-826 mV上升到浸泡72 h时的-728 mV,然后逐渐下降到浸泡168 h时的-936 mV；而自腐蚀电流密度呈相反趋势:先由浸泡1 h时的7.235 μA/cm2下降到浸泡72 h时的4.363 μA/cm2,随后逐渐升高到浸泡168 h时的23.05 μA/cm2。与Q235钢基体相比,FePSiBNb纳米结构涂层具有更好的耐腐蚀性能。 |
| 英文摘要: |
| FePSiBNb nanostructure coating was fabricated on Q235 steel substrate by high velocity electrical arc spraying process. The microstructure of coating was characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometer and transmission electron microscope. The electrochemical behaviors in 3.5% (mass fraction) NaCl solution of the coatings were studied by the electrochemical test with different immerse time. The results indicate that the FePSiBNb coating consists of nanoscale α-Fe phase, and the average size of the α-Fe crystalline is about 26 nm.The porosity of the coating is 1.6%. With the immerse time increasing, the potential of the coating is increasing from -826 mV at 1 h to -728 mV at 72 h at first, and then it decreases to -936 mV at 168 h. The corrosive current of the coating has a variation from 7.235 μA/cm2 at 1 h to 4.363 μA/cm2 at 72 h, and then it increases to 23.05 μA/cm2 at 168 h. Compared with the Q235 steel, the coating shows the better corrosion resistance. |
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