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等離子體輝光放電制備W-Mo共滲層在還原性酸中耐蝕性研究
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北京石油化工學(xué)院，特種彈性體復(fù)合材料北京市重點(diǎn)實驗室,北京石油化工學(xué)院,北京理工大學(xué),特種彈性體復(fù)合材料北京市重點(diǎn)實驗室,特種彈性體復(fù)合材料北京市重點(diǎn)實驗室

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北京石油化工學(xué)院優(yōu)秀學(xué)科帶頭人培育計劃(BIPT-BPOAL-2013)；北京石油化工學(xué)院優(yōu)秀青年及骨干教師培育計劃(BIPT-BPOYTMB-2015)；北京市光機(jī)電設(shè)備技術(shù)重點(diǎn)實驗室(KF2011-02)；北京市光機(jī)電設(shè)備技術(shù)重點(diǎn)實驗室(ZF2013-02).


Corrosion behavior of W-Mo co-penetrated layer produced by glow discharge plasma technique in reducing acid
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a Beijing Key Lab of Special Elastomeric Composite Materials,College of Materials Science and Engineering,b Beijing Institute of Petrochemical Technology, Bejing Institute of Technology,School of Optoelectronics,a Beijing Key Lab of Special Elastomeric Composite Materials,College of Materials Science and Engineering,b Beijing Institute of Petrochemical Technology, Bejing Institute of Technology,School of Optoelectronics,,a Beijing Key Lab of Special Elastomeric Composite Materials,College of Materials Science and Engineering,b Beijing Institute of Petrochemical Technology, Bejing Institute of Technology,School of Optoelectronics,a Beijing Key Lab of Special Elastomeric Composite Materials,College of Materials Science and Engineering,b Beijing Institute of Petrochemical Technology, Bejing Institute of Technology,School of Optoelectronics

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    摘要:

    在β相變點(diǎn)以下,通過空心陰極等離子體輝光放電技術(shù),在Ti6Al4V合金表面形成W-Mo共滲層來提高鈦合金基體在還原性酸中的耐蝕性。分別利用掃描電子顯微鏡、能譜儀和X射線衍射儀對試樣的表面形貌、成分分布和相組成進(jìn)行分析。結(jié)果顯示在Ti6Al4V合金表面形成一層約23μm厚,由AlMoTi2 和 TixW1-x物相組成的共滲層。利用電化學(xué)工作站,在常溫靜態(tài)條件下,對試樣在還原性酸(硫酸和鹽酸)中進(jìn)行耐蝕性研究。結(jié)果表明,經(jīng)過共滲處理的試樣在還原性酸中,能保持穩(wěn)定的腐蝕電位并且其腐蝕電流密度僅為原始試樣的1/10 和 1/6。此外,相較于鈦合金基體,處理后的試樣表面沒有發(fā)現(xiàn)腐蝕產(chǎn)物和裂紋,表明沒有腐蝕脫落現(xiàn)象發(fā)生。因此,在保證基體基本性能的前提下,鈦合金試樣的耐蝕性能明顯提高。

    Abstract:

    To improve the corrosion resistance of Ti6Al4V alloys in acid solution, a W-Mo co-penetrated top layer was prepared using hollow-cathode glow discharge plasma technique below the β phase transition point. The surface morphology, chemical composition and crystal structure of the coatings were determined by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray power diffraction (XRD), respectively. It indicated that a dense co-penetrated layer was produced with maximum thickness of approximately 23 μm. The layer was composed of AlMoTi2 and TixW1-x phases. The static corrosion test was conducted in acid (H2SO4 and HCl, respectively) at room temperature (RT) by using the electrochemical workstation. The results showed that the W-Mo co-penetrated layer could achieve relatively stable corrosion potential in reducing acid and the Icorr of co-penetrated layers occupy merely 1/10 and 1/6 that of Ti6Al4V substrates. In addition, there is barely any corroded product and crack on the corroded surface of co-penetrated layers, indicating no corroded shedding phenomenon occurred. So the corrosion resistance are obviously improved in the premise of keeping the basic properties of the substrate.

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陳飛,張玉林,劉偉光,馮文然,楊英歌.等離子體輝光放電制備W-Mo共滲層在還原性酸中耐蝕性研究[J].稀有金屬材料與工程,2018,47(3):723~728.[Fei Chen, Yulin Zhang, Weiguang Liu, Wenran Feng, Yingge Yang. Corrosion behavior of W-Mo co-penetrated layer produced by glow discharge plasma technique in reducing acid[J]. Rare Metal Materials and Engineering,2018,47(3):723~728.]
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  • 收稿日期:2016-02-27
  • 最后修改日期:2016-08-09
  • 錄用日期:2016-08-17
  • 在線發(fā)布日期: 2018-04-11
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